Answer:
A. HNO3 (aq) + KOH (aq) → H2O (l) + KNO3 (aq)
Step-by-step explanation:
A combination reaction is a chemical reaction in which two or more substances combine to form a single substance under suitable conditions. As a result of a chemical reaction new substances are formed. Thus, these reactions are also called synthesis. Combination reactions are of three types. Reaction between metals and non-metals, reaction between two non-metals and Reaction between elements and compounds. Thus, among the given options A does not fall in the group of combination reaction.