. During breathing air rich in carbon-di-oxide is given out and this process is known as


(a) respiration

(b) exhalation

(c) excretion

(d) All of the above

Best Answer

(b)

During breathing we take in air rich in oxygen and give out air rich in carbon-di-oxide. The process of giving out air rich in carbon-di-oxide is known as exhalation whereas, process of taking in air rich in oxygen is known as inhalation.

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