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🩺 NEET🧬 Biology

'Lub' sound of Heart is caused by the ______ [Re-NEET 2024]

Q1

'Lub' sound of Heart is caused by the ______

[Re-NEET 2024]

a

Closure of the semilunar valves

b

Opening of tricuspid and bicuspid valves

c

Opening of the semilunar valves

d

Closure of the tricuspid and bicuspid valves

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