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P wave of ECG indicates 1. activation ...

P wave of ECG indicates
1. activation of SA node
2. depolarization of atrial muslces
3. spread of excitation from AV node to Purkinje fibres
4. repolarization of atria and depolarization of ventricles

A

1 and 2 are correct

B

2 and 4 are correct

C

1 and 3 are correct

D

1,2 and 3 are correct

Text Solution

Verified by Experts

The correct Answer is:
A
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