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“lub” sound is produced after _________ ?

The answer of “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

Submitted by: Rashid Mehmood



Biology Mcqs
Biology Mcqs are from the different sections of Biology. which will help the students to get higher marks in biology subject. students can prepare for Medical Entry Test from our topic wise Multiple Choice question of Biology. These Mcqs will Help you to get higher marks especially in Biology Mcqs portion of test.

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