Pick out incorrect statement
| A. |
Orthohophorus acid can be obtained by reacting `P_4O_6` with `H_2O` |
| B. |
Orthophosphoric acid can be obtained by reacting `P_4O_10` with `H_2O` |
| C. |
Pyrophosphoric acid can be obtained by heat ing orthophosphourus acid |
 |
| D. |
Metaphosphoric acid is obtained by the dehydrat ion of orthophosphoric acid at 316 ºC. |