3. Select the term that does not belong in each of the following groupings. Write the letter only.

_____1. a) nostril b) nasal cavity c) conchae d) pharynx
_____2. a) sebaceous gland b) oil gland c) sebum
d) eccrine gland
_____3. a) Keratin b) melanin c) sebum d) hairs
_____4. a) boil b) warts c) tinea versicolor d) athlete foot
_____5. a) asthma b) emphysema c) pneumonia d) rhinitis