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What does medicated shampoo do?

  1. Adds volume to the hair

  2. Enhances hair color

  3. Reduces dandruff or relieves scalp conditions

  4. Removes oil build-up

The correct answer is: Reduces dandruff or relieves scalp conditions

Medicated shampoo is specifically designed to treat scalp conditions like dandruff, psoriasis, or seborrheic dermatitis. It contains active ingredients that help to reduce itching, flaking, and inflammation on the scalp. Options A, B, and D are incorrect as they refer to the cosmetic benefits of regular shampoo, which do not address any underlying scalp issues. Therefore, C is the best answer.