Assertion: Before going outdoors Rahul does not wear full sleeves clothes and does not apply insect repellent.

Reason: He is suffering from insect allergy

The correct option is B

Assertion is True, Reason is True; Reason is NOT a correct explanation for Assertion.

Option (B):

Assertion statement:

1. The response of the immune system toward the biting of certain insects is called insect allergy.
2. Wearing full-sleeved clothes and closed shoes and applying insect repellent to exposed areas before going outside to avoid symptoms like swelling in the throat or tongue, itching, stinging and minor swelling in the area around the bite, and stomach cramps, nausea, or diarrhea.

Reason statement:

1. Rahul is suffering from insect allergy so it is necessary to wear full sleeve clothes and apply insect repellent.
2. But the reason statement does not explain the exact reason why Rahul is not using the full sleeves clothes and insect repellent.

Final answer: (b) Assertion is True, Reason is True; Reason is NOT a correct explanation for Assertion.