Concept: This question tests your knowledge of the classification and functions of human cranial nerves, specifically identifying which ones have both sensory and motor components.

Why (C) is correct: The Trigeminal nerve (cranial nerve V) is a mixed nerve, meaning it has both sensory and motor functions. Its sensory component is responsible for sensation from the face, teeth, and oral cavity, while its motor component controls the muscles of mastication (chewing).

Why other options are wrong:

• (A) Olfactory: This is a purely sensory nerve, responsible for the sense of smell.
• (B) Optic: This is also a purely sensory nerve, responsible for vision.
• (D) Vagus: While the Vagus nerve (cranial nerve X) is a mixed nerve, it is primarily associated with parasympathetic control of internal organs and sensation from the pharynx and larynx, not the primary example of a mixed nerve for facial sensation and chewing as the trigeminal. The question asks for 'both sensory and motor' and Trigeminal is a classic example.

NEET Tip / Mnemonic: To remember the type of cranial nerves (Sensory, Motor, or Both), you can use the mnemonic: "Some Say Marry Money But My Brother Says Big Brains Matter More". The first letter of each word corresponds to the nerve type (S=Sensory, M=Motor, B=Both) for cranial nerves I through XII. For Trigeminal (V), it's 'My' (Motor) and 'Brother' (Both), indicating it's a mixed nerve.

Correct Answer: (C)