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What does scalp astringent lotion do?

  1. Colours the hair

  2. Moisturizes the scalp

  3. Removes oil accumulation from the scalp

  4. Straightens the hair

The correct answer is: Removes oil accumulation from the scalp

Scalp astringent lotion is specifically designed to remove excess oil buildup from the scalp. Option A, colouring the hair, is a function of hair dye, not scalp astringent lotion. Option B, moisturizing the scalp, is the role of scalp nourishing products, such as oils or serums. Option D, straightening the hair, is the effect of using a straightening or styling tool, not scalp astringent lotion. Therefore, the correct answer is C as it is the only option that accurately describes the purpose of using scalp astringent lotion.