Assertion: Nitrous acid (`HNO_(2)`) may act as an oxidising as well as a reducing agent.
Reason: The oxidation number of nitrogen remains same in all the compounds.
A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not a correct explanation A
C. A is true but R is false
D. A is false but R is true
