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Krishna Sharma • 46.94K Points
Coach Science

Q. हृदय में ध्वनि लब एवं डब उत्पन्न होती है ?

(A) अलिन्द के कारण
(B) निलय के कारण
(C) वाल्व के कारण
(D) SA नोड के कारण
Correct Answer - Option (C)

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