A) lub during closure of semilunar valves
B) lub during closure of atrioventricular valves
C) dupp during closure of atrioventricular valves
D) dupp during closure of semilunar valves
Correct Answer: D
Solution :
There are four heart sound named \[{{S}_{1}},\,{{S}_{2}},\,{{S}_{3}}\] and \[{{S}_{4}}\]. The first sound is known as lub, which is created by closure of atrioventricular valves. Second sound is dupp, which is created by closure of aortic and pulmonary semilunar valves towards the end of ventricular systole.
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