The first heart sound is associated with `:-`

The first heart sound is associated with `:-`
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Answer :

The first heart sound is associated with `:-` A. Closure of the semilunar valves B. ... the semilunar valves D. Opening of the Eustachian valve
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The second heart sound (dubb) is associated with the closure of

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

Last Answer : The second heart sound (dubb) is associated with the closure of A. Tricuspid of B. Semilunar valves C. Bicuspid valve D. Tricuspid and bicuspid valves