Answer the question on the basis of the passage given below:

Oxides formed by \(p\)- block elements are acidic, basic and neutral. Also, elements of \(p\)-block from different acids.

Match List I with List II

Choose the correct answer from the options given below:

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

The correct answer is option 2. A-IV, B-III, C-I, D-II.

A. \(H_4P_2O_7\) : IV. +5:

The compound \(H_4P_2O_7\) is known as pyrophosphoric acid.

Let the oxidation number of \(P\) in \(H_4P_2O_7\) be \(x\). Then,

\(4 × (+1) + 2x + 7 × (-2) = 0\)

or, \(4 + 2x - 14 = 0\)

or, \(2x - 10 = 0\)

or, \(x =  +5\)

B. \(H_4P_2O_6\) : III. +4:

The compound \(H_4P_2O_6\) is known as hypophosphoric acid.

Let the oxidation number of \(P\) in \(H_4P_2O_6\) be \(x\). Then,

\(4 × (+1) + 2x + 6 × (-2) = 0\)

or, \(4 + 2x - 12 = 0\)

or, \(2x - 8 = 0\)

or, \(x =  +4\)

C. \(H_3PO_2\) : I. +1:

The compound \(H_4P_2O_7\) is known as hypophosphorous acid.

Let the oxidation number of \(P\) in \(H_3PO_2\) be \(x\). Then,

\(3 × (+1) + x + 2 × (-2) = 0\)

or, \(3 + x - 4 = 0\)

or, \(x - 1= 0\)

or, \(x =  +1\)

D. \(H_3PO_3\) : II. +3:

The compound \(H_4P_2O_7\) is known as phosphorous acid.

Let the oxidation number of \(P\) in \(H_3PO_3\) be \(x\). Then,

\(3 × (+1) + x + 3 × (-2) = 0\)

or, \(3 + x - 6 = 0\)

or, \(x - 3= 0\)

or, \(x =  +3\)