The Philtrum Is

Multiple Choice

The philtrum is:

A) the space between the pharyngeal tonsils in the pharynx.
B) the thin fold of connective tissue joining the upper lip and the space between the upper central incisors.
C) the vertical groove in the middle of the upper lip that extends from the upper lip to the nasal septum.
D) the thin fold of connective tissue joining the lower lip and lower central incisors.