Which of the following oxoacids of phosphorus has strongest reducing property? (NEET (Odisha)2019)

P–H bonds found in phosphorus acids have reducing properties. Thus, reducing property is directly proportional to number of P–H bonds. The structure of given oxoacids of phosphorus are as follows: H3PO2 contains 2P–H bonds which is maximum among the given options. Thus, H3PO2 has strongest reducing property. P-BLOCK ELEMENTS (GROUP 15-18) 32