'Dubb' sound is produced by the closure of:
Correct answer: D. Semilunar valves
- A. Bicuspid valves
- B. Tricuspid valves
- C. Bicuspid and tricuspid valves
- D. Semilunar valves
Explanation
The "dubb" sound is produced by the closure of the aortic and pulmonary valves, which are the semilunar valves. The bicuspid and tricuspid valves are atrioventricular valves, and they produce the "lub" sound.
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