Question: 1 . What is a normal PR interval? a . 0 . 2 0 - 0 . 3 0 seconds b . 0 . 0

1. What is a normal PR interval?
a.0.20-0.30 seconds
b.0.04-0.12 seconds
c.0.06-0.20 seconds
d.0.12-0.20 seconds

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