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[H=1, C=12,O=16, Na=23, P=31,S=32] {:(...

[H=1, C=12,O=16, Na=23, P=31,S=32]
`{:("Column-I","Column-II"),((A)4.1 g H_2SO_3,(p)"200 ml of 0.5 N NaOH is used for complete neutralization"),((B)4.9 g H_3PO_4,(q)"200 millimoles of oxygen atoms"),((C )4.5 g "oxalic acid"(H_2C_2O_4),(r)"Central atom has its highest oxidation number"),((D)4.3 g Na_2CO_3,(s)"May react with an oxidising agent"),(,(t)"Shape around central atom is regular"):}`

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A, B, C, D
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