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Which nerve controls the sense of smell?

  1. Auditory nerve

  2. Optic nerve

  3. Olfactory nerve

  4. Trigeminal nerve

The correct answer is: Olfactory nerve

The olfactory nerve is responsible for the sense of smell. The auditory nerve (A) is responsible for hearing, not smell. The optic nerve (B) is responsible for vision, not smell. The trigeminal nerve (D) controls sensation in the face, but it does not specifically control smell.