Which one of the following is an oxyacid ?
Which one of the following is an oxyacid ?
A. `Ba(OH)_2 `
B. `Mg(OH)_2 `
C. `H_3PO_3`
D. HCl
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Which one of the following is an oxyacid ?
A. `Ba(OH)_2 `
B. `Mg(OH)_2 `
C. `H_3PO_3`
D. HCl