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What prevents backflow of blood inside the heart during contraction?
AValves in heart
BThick muscular walls of ventricles
CThin walls of atria
DAll of the above
Answer & Solution
Correct answer: A. Valves in heart
This Life Processes item tests a core Biology concept.
Correct answer: Valves in heart.
_Source: NCERT Exemplar Science Class 10 (NCERT)_
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