2991: Assertion
Comets have gaseous tails
Reason
They are very hot bodies
(a) if A and R both are correct and R is the correct explanation of A
(b) if A and R both are correct but R is not the correct explanation of A
(c) if A is correct and R is incorrect
(d) if A is incorrect and R is correct
2992: Assertion (A) :
DNA Finger printing has become a powerful tool to establish paternity and identity of criminals in rape and assault cases.
Reason (R) :
Trace evidences such as hairs, saliva and dried semen are adequate for DNA analysis.
(a) Both A and R are true, and R is the correct explanation of A
(b) Both A and R are true, but R is not a correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true
2993: Consider the following statements:
1. Biodiversity is normally greater in the lower latitudes as compared to the higher latitudes.
2. Along the mountain gradients, biodiversity is normally greater in the lower altitudes as compared to the higher altitudes.
Which of the statements given above is are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 and 2
2994: The characteristic odour of garlic is due to
(a) a chloro compound
(b) a sulphur compound
(c) a fluorine compound
(d) acetic acid
2995: In an examination, there are three subjects A, B and C. A student has to pass in each subject. 20% students failed in A, 22% students failed in B and 16% failed in C. The total number of students passing the whole examination lies between
(A) 42% and 84%
(B) 58% and 84%
(C) 58% and 78%
(D) 42% and 78%