In the manufacture of orthophosphoric acid by strong H2SO4 leaching wet process, keeping the reactor temperature above 100¬∞C, results in the formation of undesriable$

In the manufacture of orthophosphoric acid by strong H2SO4 leaching we

1.	In the manufacture of orthophosphoric acid by strong H2SO4 leaching wet process, keeping the reactor temperature above 100¬∞C, results in the formation of undesriable$
A.	CaSO4 .H2O and CaSO4 crystals
B.	pyrophosphoric acid
C.	metaphosphoric acid
D.	all (a), (b) and (c).
Answer» B. pyrophosphoric acid