`{:(,underset(("Oxy acids of phosphoros"))("Column I"),,underset(("Characteristic bonds"))("Column II")),((A),H_(4)P_(2)O_(7),(p),P-P"bond" (s)),((B),H_(4)P_(2)O_(5),(q),P--P "bond"(s)),((C),H_(4)P_(2)O_(6),(r),P-H "bond" (s)),((D),(HPO_(3))_(n)("cyclic"),(s),"Three of four P-OH" bonds):}`

Answer

`(A - q,s);(B - q,r);(C - p,s);(D - q,s)`

Explanation

(A) `H_(4)P_(2)O_(7)`

(B) `H_(4)P_(2)O_(5)`
(##RES_INO_CHM_XII_V02_C02_E01_346_S02.png" width="80%">
(C)`H_(4)P_(2)O_(6)
(##RES_INO_CHM_XII_V02_C02_E01_346_S03.png" width="80%">
(D) `(HPO_(3))("cyclic")`
(##RES_INO_CHM_XII_V02_C02_E01_346_S04.png" width="80%">