Question

In one heart beat, atria and ventricles of human heart relax for -----and------ respectively.
(a) 0.4, 0.5 sec
(b) 0.4, 0.7 sec
(c) 0.7, 0.5 sec.
(d) 0.1, 0.3 sec.

Answer 1

ur answer is option

B

hope it's help

Answer 2

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Given

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OPTION = B

0.4 , 0.7 sec