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In a society it is customary for friends of the same sex to hug and for friends of opposite sex to shake hands when they meet. A group of friends met in a party and there were 24 handshakes. Which one among the following numbers indicates the possible number of hugs?

There are 5 tasks and 5 persons. Task-l cannot be assigned to either person-l or person-2. Task-2 must be assigned to either person-3 or person-4. Every person is to be assigned one task. In how many ways can the assignment be done?

MEA says it wants to recruit a record 110 Foreign Service officers over the next two years through UPSC.

The English alphabet is: ABCD EFGH IJKL MNOP QRST UVWX YZ As per the question, the letters are arranged as follows: DCBA HGFE LKJI PONM TSRQ XWVU ZY 13th letter in this arrangement is P. And the 4th letter to its right is T.

In case of averages, addition of items below average decreases it and adding items above average increases it. Lowest score of Class-B Student is higher than highest score of Class-A student. Therefore, any movement of student from A to B will lead to decrease in average. Hence, Statement 1 is correct. However, we don't know if marks of the 4 students that have been moved from class A are above or below the average. If above average, will lead to decrease in the average marks of Class A. If they have marks close to 17 ie below average, it will lead to increase in the average marks of Class A. Therefore, we cannot determine whether "definite" or confirmed increase happens. Hence, Statement 2 is incorrect.

In the English alphabet, the first 4 letters are written in opposite order, and the next 4 letters are written in opposite order and so on; and at the end Y and Z are interchanged. Which will be the fourth letter to the right of the 13th letter?

There are two Classes A and B having 25 and 30 students respectively. In Class-A the highest score is 21 and lowest score is 17. In Class-B the highest score is 30 and lowest score is 22. Four students are shifted from Class-A to Class-B. Consider the following statements: 1. The average score of Class-B will definitely decrease. 2. The average score of Class-A will definitely increase. Which of the above statements is/are correct?

The elections for Cantonment Boards are held in accordance with provisions of sections 14 and 15 of the Cantonments Act, 2006. To be held on such date as the Central Government may, by notification in the Official Gazette, direct. So, statement 1 is incorrect. It operates in accordance with the provisions of the Cantonment Act of 2006 and falls under the jurisdiction of the Union Defense Ministry. So, statement 2 is correct. Cantonment Board: Established by Municipal administration for the civilian population in the cantonment area. It works under the administrative control of the Defence Ministry of the government of India. Created as well as administered by the central govt. The Military Officer commanding the station is the ex-officio president of the board. Executive- The officer is appointed by the President of India. So, statement 3 is correct.

DNA barcoding is used for more than just research – it can also help address problems with broad impacts on all areas in which society interacts with biodiversity. Some practical applications include pest and disease control, food production and safety, resource management, biodiversity conservation, and education. So, option D is correct. DNA barcoding is a technique used to identify species by analyzing short, standardized segments of their DNA. It's like a fingerprint for a species. Just like a supermarket scanner uses the barcode on a product to identify it, scientists can use DNA barcodes to identify an unknown organism by comparing its DNA sequence to a reference library of known sequences. DNA barcoding is a relatively new technique, but it has already become a valuable tool for scientists in a variety of fields. Some of the applications of DNA barcoding are: ● Identification of species: DNA barcoding can be used to identify unknown organisms, such as insects, plants, or fish. This can be helpful for tasks such as monitoring biodiversity, tracking the spread of invasive species, and identifying organisms that are important for medicine or agriculture. ● Detection of invasive species: DNA barcoding can be used to quickly and accurately identify invasive species, which can help to prevent them from spreading and damaging ecosystems. ● Delimiting cryptic species: Cryptic species are species that are morphologically similar but genetically distinct. DNA barcoding can help to identify and distinguish between cryptic species. ● Diet analysis and food web applications: DNA barcoding can be used to analyze the diets of animals by identifying the DNA of their prey in their stomachs. This can help scientists to understand food webs and the relationships between different species. ● Barcoding for food safety: DNA barcoding can be used to identify the species of animals and plants in food products. This can help to ensure that food is labelled correctly and to prevent fraud. ● Biomonitoring and ecological assessment: DNA barcoding can be used to monitor changes in the abundance and diversity of species over time. This can help assess the health of ecosystems and the impact of human activities. ● Forensic science: DNA barcoding can be used to identify the species of origin of biological materials, such as blood, hair, or tissue. This can be helpful in forensic investigations.

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