Questions: Which of the following cranial nerves is responsible for the sensory function of smell? (A) CNII (B) CN VIII (C) CNI (D) CNV

The answer is (C) CNI.

Explanation for each option: (A) CNII: This is the optic nerve, which is responsible for vision, not smell. (B) CNVIII: This is the vestibulocochlear nerve, which is responsible for hearing and balance, not smell. (C) CNI: This is the olfactory nerve, which is responsible for the sensory function of smell. (D) CNV: This is the trigeminal nerve, which is responsible for facial sensation and motor functions such as biting and chewing, not smell.

In summary, the cranial nerve responsible for the sensory function of smell is the olfactory nerve, CNI.