Which of the following is a tetrabasic acid [CPMT 1988]

1.	Which of the following is a tetrabasic acid [CPMT 1988]
A.	Orthophosphorus acid
B.	Orthophosphoric acid
C.	Metaphosphoric acid
D.	Pyrophosphoric acid
Answer» E.

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Which of the following is a tetrabasic acid [CPMT 1988]

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