Q.

Normal duration of PR interval in ECG is ……..

A. 0.12 to 0.20 sec
B. 0.20 to 0.40 sec
C. 0.12 to 0.20 mv
D. 0.12 to 0.20 mm
Answer» A. 0.12 to 0.20 sec
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Roganidan Evam Vikriti Vigyana

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