lub sound is produced after _________ ?

A: The ventricles are fully contracted

B: The ventricles start to relax

C: The bicuspid and tricuspid valves suddenly close

D: The semilunar valves are closed

Check Correct Option

The bicuspid and tricuspid valves suddenly close

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Sheeraz Ahmed graduated from National University of Modern Languages Islamabad in 2019, currently he is CSS Aspirant, and he also appeared in Sindh Public Service Commission (SPSC), Federal Public Service Commission (FPSC) for the purpose of recruitment. At our site Sheeraz publishes the Important MCQs to help students and Job Seekers.

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lub sound is produced after _________ ?