1.

Which one is the first heart sound?a)Lub during closure of semilunar valvesb)Lub during closure of atrioventricular valvesc)Dub during closure of atrioventricular valves d)Dub during closure of semilunar valves

Answer»

HEYAAA,,,,,,

OPTION B. IS CORRECT...

HOPES ITS HELPFUL...



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