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Railways PYQCBT 1 2016

RRB NTPC · Question 55

Human nails are made of A. Pigment B. Elastin C. Albumin D. Keratin

  1. A

  2. D

  3. C

  4. B

Show answer & explanation

Answer: (B) D

Explanation

Human nails, like hair and the outer layer of skin, are made of keratin, a tough fibrous structural protein.