question_answer

Forced deep breathing for a few minutes by a person at rest may be followed by a temporary cessation of breathing, because of:

A) Too much \[{{O}_{2}}\] in blood. 

B) Too much \[C{{O}_{2}}\] in blood, 

C) Little \[C{{O}_{2}}\] in blood.        

D) Both too much \[{{O}_{2}}\] and very little \[C{{O}_{2}}\] in blood.