Multiple choice

The air passing through the nostrils in humans is filtered by

  1. the mucus and innermost surface of nostrils

  2. the mucus and fine hairs in the nostrils

  3. fine hairs, mucus and innermost surface of nostrils

  4. fine hairs and innermost surface of nostrils
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The air passing through the nostrils is filtered by the fine hairs and mucus present in the nostrils. So, option 2 is correct.

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