Assertion :
Insects develop a complex system of air tubes called trachea for respiratory purpose.
Reason: Exchange through body surface is not possible in insects.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
As the integument of insect is thick and impermeable to minimize lose of body water, they can not carryout gas exchange through their body surface. To overcome this difficulty they have developed a complex system of air tubes called trachea to reach the air directly near the tissue cells. Each trachea communicates with the exterior through openings in the body wall. So, the correct answer is 'Both Assertion and Reason are correct and Reason is the correct explanation for Assertion'.

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