The unbalanced chemical reactions given ...

The unbalanced chemical reactions given in Column I show missing reagent or condition (?) which are provided in Column II. Match Column I with Column II and select the correct answer using the codes gives below the Columns.
`{:(Column I,Column II),(P.PbO_(2)+H_(2)SO_(4) overset(?)rarrPbSO_(4)+O_(2)+"other product",1.NO),(Q.Na_(2)S_(2)O_(3)+H_(2)O overset(?)rarrNaHSO_(4)+ "other product",2.I_(2)),(R.N_(2)H_(4)overset(?)rarrN_(2)+ "other product",3."Warm"),(S.XeF_(2)overset(?)rarrXe+ "other product",4.CI_(2)):}`

`{:(P,Q,R,S),(4,2,3,1):}`

`{:(P,Q,R,S),(3,2,1,4):}`

`{:(P,Q,R,S),(1,4,2,3):}`

`{:(P,Q,R,S),(3,4,2,1):}`

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The correct Answer is:

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The unbalanced chemical reactions given in List I show missing reagent or condition (?) which are provided in List II. Match List I with List II and select the correct answer using the code given below the lists {:(,"List I",,"List II"),(P.,PbO_(2)+H_(2)SO_(4)overset(?)rarr PbSO_(4)+O_(2),1.,NO),(Q.,Na_(2)S_(2)O_(3) + H_(2)O overset(?)rarr NaHSO_(4),2.,I_(2)),(R.,N_(2)H_(4) overset(?)rarr N_(2) + "other product",3.,"Warm"),(S.,XeF_(2)overset(?)rarr Xe + "other product",4.,Cl_(2)):}

`{:(,P,Q,R,S),((a),4,2,3,1):}`

`{:(,P,Q,R,S),((a),3,2,1,4):}`

`{:(,P,Q,R,S),((a),1,4,2,3):}`

`{:(,P,Q,R,S),((a),3,4,2,1):}`

P-(ii), Q-(i), R-(iii), S-(iv)

P-(iv), Q-(i), R-(ii), S-(iii)

P-(ii), Q-(iv), R-(iii), S-(i)

P-(ii), Q-(i), R-(iv), S-(iii)

`C_(6)H_(5) - overset(O)overset(||)(C ) - C_(6) H_(5)`