1.

      Assertion [A]: In human beings, the female play a major role in determining the sex of the offspring. Reason (R): Women have two X-chromosomes. [IAS]                                                                                                                                                                    

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
Answer» E.


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