Multiple choice

Which of the following statements is/are correct?

a. Carbon dioxide is present in inhaled air. b. Carbon dioxide is produced during respiration. c. The proportion of nitrogen gas in both inhaled and exhaled air remains the same.

  1. a only

  2. b only

  3. c only

  4. b and c

  5. a, b and c
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct answer as all the given statements are correct.

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