Normal PR interval in ECG is:

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Normal PR interval in ECG is: mcq given below:

(a) 0.20-0.35 second
(b) 0.30- 0.45 second
(c) 0.35- 0.40 second
(d) 0.12- 0.20 second

Ans:(d) 0.12- 0.20 second

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