Question

the opening to the outer ear is the: a oval window. b elongated window. c external auditory meatus. d tympanic membrane.

Explanation:

The outer ear consists of the pinna (auricle) and the external auditory meatus (ear canal). The oval window is part of the inner ear, the elongated window is not a standard anatomical term in this context, and the tympanic membrane (eardrum) is the boundary between the outer and middle ear.

Answer:

C. external auditory meatus.