(c) Nitrogen O (d) Oxygen and nitrogen4. The breathing rate in humans under normal conditions is(a) 16-18 times (b) 20-25 times (c) 30-32 times(d) 18-20 times5. Which of the following resp

(c) Nitrogen O (d) Oxygen and nitrogen4. The breathing rate in human

1.	(c) Nitrogen O (d) Oxygen and nitrogen4. The breathing rate in humans under normal conditions is(a) 16-18 times (b) 20-25 times (c) 30-32 times(d) 18-20 times5. Which of the following resp
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