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What characterizes a wheal?

  1. Wart-like growth

  2. Itchy, swollen lesion

  3. Oily plate of flakes

  4. Foul-smelling perspiration

The correct answer is: Itchy, swollen lesion

A wheal is a raised, red area on the skin that is often itchy and surrounded by a white halo. It is commonly caused by an allergic reaction or insect bite. Option A is incorrect because a wart-like growth is a firm, rough, and raised bump on the skin caused by a virus. Option C is incorrect because an oily plate of flakes may indicate a condition like psoriasis, which is characterized by silvery scales on the skin. Option D is incorrect because foul-smelling perspiration is a characteristic of a skin infection, not a wheal.