P wave of ECG representsP wave of ECG represents  mcq given below:

Q. P wave of ECG represents

(a) SA node and repolarizing the atria
(b) SA note and depolarizing the atria
(c) AV note and depolarizing the atria
(d) Impulse travelling from SA node to AV node

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Ans: (b) SA note and depolarizing the atria 
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