Given below are two statements: one is labelled Assertion (A) and other is labelled Reason (R).
Assertion (A): Females heterozygous for haemophilia die due to non-stop bleeding during injury.
Reason (R): Blood fails to clot in females, heterozygous for haemophilia.
In the light of above statements, choose the correct answer from the options given below.

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

Both (A) and (R) are true but (R) is not the correct explanation of (A).

(A) is true but (R) is false.

Both (A) and (R) are false.

answer is D.

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Detailed Solution

Both (A) and (R) are false.

Assertion (A) claims that females heterozygous for hemophilia die due to non-stop bleeding during injury, which is false. Heterozygous females for hemophilia may have reduced clotting factor levels, but they typically do not suffer from non-stop bleeding to the extent described in the assertion. Carrier females are not affected. But they carry the trait to next generation.
Reason (R) states that blood fails to clot in females heterozygous for hemophilia, which is also false. While heterozygous females may have lower levels of clotting factors compared to females with normal genotype, they still produce enough clotting factors to allow for normal blood clotting in most cases. Therefore, this statement is not accurate either.

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