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a
Swallowing of food
b
Shivering in cold
c
Salivation at choicest food
d
Closure of eyelid by flashing light
answer is B.
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Detailed Solution
Reflex action is the rapid, involuntary and unconscious actions of the body brought about by any part of the CNS through sudden stimulation from receptors. Shivering in cold is not a reflex action.