Given below are two statements. One is labeled as Assertion A and the other is labeled as Reason R.
Assertion (A): Ventricular systole increases the ventricular pressure causing the closure of tricuspid and bicuspid valves.
Reason (R): Atrial systole accounts to only 21 ml of ventricular filling.
In the light of the above statements, choose the most appropriate answer from the options given below.

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A is not correct, but R is correct.

Both A and R are correct, but R is not the correct explanation of A.

Both A and R are correct and R is the correct explanation of A.

A is correct but R is not correct.

answer is B.

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Detailed Solution

Assertion (A) is true. Ventricular systole increases the ventricular pressure causing the closure of tricuspid and bicuspid valves. Ventricles undergo contraction during ventricular systole and so the pressure increases.
Reason (R) is true. Atrial systole accounts to only 21 ml of ventricular filling.
But (R) does not explain (A).

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