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The cardiac pacemaker in a patient fails...

The cardiac pacemaker in a patient fails to function normally. The doctors find that an artifical pacemaker is to be grafted in him. It is likely that it will be grafted at the site of `-`

A

Purkinje system

B

Sinuatrial node

C

Atrioventricular node

D

Atrioventricular bundle

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The correct Answer is:
B
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