Protein found in a part of the body (muscle, nails)

This type of question, asked 2 times: 17 Apr 2026 S2, 18 Apr 2026 S2. All 2 questions below, oldest first.

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Question 1
17 Apr 2026 S2
46 $Which from following is a protein of muscles ?$
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Question 2
18 Apr 2026 S2
46 $Identify a protein present in nails$
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