Official Answer Key & Detailed Solution
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Correct Answer: Option (B) — A – 2; B – 1; C – 4; D – 3
Concept & Option Breakdown
Standard Reference Verified• Carotene is a provitamin (precursor to Vitamin A) (A - 2). • Pepsin is a proteolytic digestive enzyme (B - 1). • Progesterone is a female steroid hormone (C - 4). • Keratin is a structural protein (D - 3).
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