Match List I with List II

	List I Industry		List II Waste Generated
(A)	Steel plants	(I)	Gypsum
(B)	Thermal power plants	(II)	Fly ash
(C)	Fertilizer Industries	(III)	Slag
(D)	Paper mills	(IV)	Bio-degradable wastes

Choose the correct answer from the options below:

Matching industries with their waste:

(A) Steel plants → Slag (III): Steelmaking produces slag as a byproduct (mixture of metal oxides and silicon dioxide).

(B) Thermal power plants → Fly ash (II): Burning coal in thermal power plants produces fly ash.

(C) Fertilizer Industries → Gypsum (I): Phosphoric acid production in fertilizer industries produces phosphogypsum as waste.

(D) Paper mills → Bio-degradable wastes (IV): Paper mills produce biodegradable organic waste (lignin, cellulose residues).

Matching: A-III, B-II, C-I, D-IV

The correct answer is Option 1.