A student on a school trip started sneezing and wheezing soon after reaching the hill station for no explained reasons.

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Q 2625301261.     A student on a school trip started sneezing and wheezing soon after reaching the hill
station for no explained reasons. But, on return to the plains, the symptoms
disappeared. What is such a response called? How does the body produce it?
CBSE-12th 2013

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(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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