Answer: The given reaction is the generic reaction for synthesis reaction.
Step-by-step explanation:
For the given options:
- Option A: Single displacement reaction
Single displacement reaction is defined as the reaction in which more reactive element displaces the less reactive element fro its chemical reaction.

- Option B: Double-displacement reaction
Double-displacement reaction is defined as the reaction in which exchange of ions takes place.

Synthesis reaction is defined as the reaction in which two substances combine in their elemental state to form one single product

Decomposition reaction is defined as the chemical reaction in which a large substance breaks down into two or more small substances

Hence, the given reaction is the generic reaction for synthesis reaction.