Concept: This question tests your understanding of reflex actions, specifically how the nervous system mediates responses to external stimuli like the sight of food.

Why (B) is correct: The sight of delicious food triggering salivation is a classic example of a conditioned reflex, which is mediated by the nervous system. The visual stimulus (sight of food) is perceived by the eyes, transmitted as nerve impulses to the brain, processed, and then efferent nerves stimulate the salivary glands to secrete saliva. This entire pathway involves neurons, making it a neural response.

Why other options are wrong:

• (A) Hormonal response: Hormonal responses involve chemical messengers (hormones) transported via the bloodstream, which is a slower process. Salivation is a rapid, immediate response.
• (C) Optic response: While the optic nerve is involved in perceiving the sight, the overall response (salivation) is not solely an 'optic' response; it's a complex neural pathway.
• (D) Olfactory response: Olfactory response relates to the sense of smell. While the smell of food can also cause salivation, the question specifically mentions the 'sight' of food.

Common Mistake: Students might confuse this with a simple sensory input, but it's the entire reflex arc involving the brain and efferent nerves that makes it a neural response.

NEET Tip / Mnemonic: Remember that most rapid, involuntary bodily reactions (like reflexes) are controlled by the nervous system. Think of the 'fight or flight' response or knee-jerk reflex – all neural.

Correct Answer: (B)