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Question

Heart sound which is longer is


A
Lubb
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B
Dub
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C
Both are equal
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D
Sometimes (a) and sometimes (b).
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Solution

The correct option is C Lubb

A. Lubb

Reason: The lubb is caused partly by the closure of the bicuspid and tricuspid valves and partly by the contraction of the muscles in the ventricles. It is low pitched, not very loud and of long duration.


Biology

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