question_answer

      The following questions consist of two statements, one labelled as the Assertion [A] and the other as Reason (R), You are to examine these two statements carefully and select the answers to these items using the codes given below:                         [NDA]

Assertion [A]: Atomic weights of most of the elements are not whole numbers.

Reason (R): Atoms of most of the elements contain mixture of isotopes having different atomic weights.

                                                     

A) Both A and R are individually true and R is the correct explanation of A

B) Both A and R are individually true but R is NOT the correct explanation of A

C) A is true but R is false

D) A is false but R is true