Which of the following is not a disproportionation reaction?
`I) NH_4 NO_3 overset(Å)(rarr)N_2O + H_2O" " II) P_4 overset(Å)(rarr) PH_3 + HPO_2^(Theta)`
`III) PCl_5 overset(Å)(rarr) PCl_3 + Cl_2 " " IV) IO_3^(Theta) + I^(Theta) to I_2`

Options

A. I, II
B. I, III, IV
C. II, IV
D. I, III

Answer

B

Explanation

Reaction II is disproportionation, while I, III, and IV are not.