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Question

When we inhale air, the incoming dirt and dust particles sticks to a sticky layer called .

A
mucus
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B
trachea
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C
nasal hair
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D
larynx
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Solution

The correct option is A mucus
Mucus is a sticky layer to which the incoming dirt and dust particles stick when we inhale air. Moreover, there is also a layer of very small hair (nasal hair) that also traps dust particles.

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