Assertion : Haemophilia never occurs in women.
Reason : Gene for hemophilia is located on X chromoseome.

Options

A. If both the assertion and the reason are true and the reasons is a correct explanation of the assertion
B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C. If the assertion is true but the reson is false
D. If both the assertion and reason are false

Answer

a

Explanation

Haemophilia never occurs in women because it is a recessive gene disease if both the sex chromosome `X^(th),X^(h),` it will be lethal i.e. such female die before birth. Its gene is never found on chromosome Y.