A) tympanic membrane
B) tensor tympani
C) scala tympani
D) scala vestibule
Correct Answer: A
Solution :
External ear is the outermost part of an ear distinguished into an ear pinna (= auricle) and an auditory canal. The auditory canal is also lined by hairy skin. It is supported by bone except for a shorter outer part, which is supported by cartilage, like pinna. It is internally closed and separated from middle ear by a thin but stiff, slightly curved and oblique tympanic membrane or 'eardrum
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