Match List I with List II :

List-I (Transition metal/compound/complex)	List-II (Catalytic Role)
(A) \(V _2 O _5\)	(I) Preparation of ammonia from \(N _2 / H _2\) mixture
(B) Fe	(II) Polymerisation of alkynes
(C) \(PdCl _2\)	(III) Preparation of \(H _2 SO _4\) from \(SO _2\)
(D) Ni complex	(IV) Oxidation of ethyne to ethanal

Choose the correct answer from the options given below:

(D) A-III, B-I, C-IV, D-II
\(V _2 O _5\) is used as a catalyst in the Contact process for the oxidation of \(SO _2\) to \(SO _3\) during the preparation of \(H _2 SO _4\). Thus, A matches with III.
Finely divided Fe is used as a catalyst in the Haber process for the preparation of ammonia from \(N _2\) and \(H _2\) mixture. Thus, B matches with I.
\(PdCl _2\) is used as a catalyst in the Wacker process for the oxidation of ethene (referred to as ethyne in the given options) to ethanal. Thus, C matches with IV.
Ni complexes are used as catalysts for the polymerisation of alkynes (e.g., polymerisation of ethyne to cyclooctatetraene). Thus, D matches with II.
The correct matching is A-III, B-I, C-IV, D-II.