Question

Q. The back flow of blood during the pumping of blood by heart is prevented by:

a) Walls of ventricles

b) Walls of atrium

c) Valves in heart

d) Walls between atria and ventricles
.
.
.
plzz anyone tell me it's correct answer.
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Answer 1

Answer:

Answer is d.

Hope it will help you .

Explanation: