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An Intiative by Sri Chaitanya
a
Hypophosphorus acid H3PO2 is also named as phosphonic acid.
b
Orthophosphorus acid H2PO3 is also named as phosphonic acid
c
Metaphosphoric acid exists as discrete molecules HPO3
d
Orthrorphosphoric acid, metaphosphoric acid and pyrophosphoric acid all havephosphorus in +5 oxidation state
answer is D.
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