The second heart sound (dub) is associated with the closure of:

Tricuspid valves

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Semilunar valves

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Bicuspid valves

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Tricuspid and bicuspid valves

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Solution

The correct option is B Semilunar valves
During each cardiac cycle two prominent sounds are produced which can be easily heard through a stethoscope. The first heart sound (lub) is associated with the closure of the tricuspid and bicuspid valves whereas the second heart sound (dub) is associated with the closure of the semilunar valves.

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