Average of heart beat of Adult Human?

A. 60 to 100 

B. 70 to 100 

C. 50 to 100 

D. 80 to 100 

Details:

A normal resting heart rate for adults ranges from 60 to 100 beats per minute. Generally, a lower heart rate at rest implies more efficient heart function and better cardiovascular fitness. For example, a well-trained athlete might have a normal resting heart rate closer to 40 beats per minute.