The correct answer is (C) dizziness; a sensation that one's surroundings and external objects are whirling around one; a disordered condition, in which the patient loses equilibrium and consciousness; a dizziness brought on by heights.

Vertigo comes from Latin vertere (to turn).

Examples of use:

• His vertigo was always accompanied by a headache.
• To my knowledge, nobody, with whom I am acquainted, suffers from vertigo.