During rest the breathing occurs rhythmically at the frequency of _________ times per minute in human?

A. 5?10

B. 15-20

C. 16-30

D. 6?12

Found an error? Read our corrections policy and report it in the comments below.

Be the first to comment if anything wrong with this mcq
Your comment successfully submitted!
It will automatically posted after review and approval by our staff member.