Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : SO₂(g) is absorbed to a large extent than H₂(g) on activated charcoal.

Reason R : SO₂(g) has a higher critical temperature than H₂(g).

In the light of the above statements, choose the most appropriate answer from the options given below.

Match List - I with List - II :

	List - I (compound)		List - II (effect/affected species)
(a)	Carbon monoxide	(i)	Carcinogenic
(b)	Sulphur dioxide	(ii)	Metabolized by pyrus plants
(c)	Polychlorinated biphenyls	(iii)	haemoglobin
(d)	Oxides of Nitrogen	(iv)	Stiffness of flower buds

Choose the correct answer from the options given below :

Number of Cl = O bonds in chlorous acid, chloric acid and perchloric acid respectively are :

The product obtained from the electrolytic oxidation of acidified sulphate solutions, is :