(D) Commodity — Commodity derivatives market trades contracts for which the underlying asset is a commodity, such as agricultural products (wheat, cotton) or precious metals (gold, silver).
Source: Chapter 5, What is Commodity Derivatives Market?
This is a direct definition-based MCQ. The passage explicitly states "Commodity derivatives market trade contracts for which the underlying asset is commodity." Options A (Index), B (Currency), and C (Stock) are underlyings for financial derivatives, not commodity derivatives. Always remember this key distinction.