Question

Consider the following statements:
Assertion (A): In cardiac cycle, whenever ventricles relax, the second sound dup is produced.
Reason (R): Closure of semilunar valves of pulmonary valve and aortic valve.
The correct answer is

• A. Both (A) and (R) are true, (R) is the correct explanation of (A)
• B. Both (A) and (R) are true, (R) is not the correct explanation of (A)
• C. (A) is true, but (R) is false
• D. (A) is false, but (R) is true

Hint:

Heart Sounds:

• {LUB (1st):} Closure of AV valves (Tricuspid/Bicuspid) $\rightarrow$ Start of Systole.
• {DUB (2nd):} Closure of Semilunar valves $\rightarrow$ Start of Diastole.

Answer 1

The Correct Option is A