When we breathe in, we inhale many gases that are not needed by the body?
A. Given off from the body through inhalation.
B. Taken out from the body through exhalation
C. Both a and b
D. All of these
A. Given off from the body through inhalation.
B. Taken out from the body through exhalation
C. Both a and b
D. All of these
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Answer: B
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