215. Regarding the reaction: $\mathrm{12H_3PO_4(aq) + NO(g) \rightarrow aP_4(s) + bHNO_3(aq) + cH_2O(l)}$, after fully balancing the equation, how many of the following statements are correct?
- The ratio $c$ to $b$ equals $0.4$.
- It has several active anions in it.
- The oxidation number of the oxygen atom does not change in it.
- The stoichiometric coefficient of one of the reactants equals the stoichiometric coefficient of one of the products.
- The change in oxidation number of every oxidizing species multiplied by its coefficient equals the stoichiometric coefficient of one of the reactants.
(1) two (2) three (3) four (4) five