What is not a function of mucus in the nasal cavity?

The nasal cavity refers to the interior of the nose, while mucous is produced by sinuses and then moves into the nasal cavity where it is pushed back to the back of the nose and then swallowed.  The function of the mucus is to trap impurities in the air and to keep the skin inside the nose moist and healthy. Removing oxygen from inhaled air is not a function of mucus in the nasal cavity.

answer (c) by causing social withdrawal;