Explanation:

- Repercussion: A consequence or impact that follows an event or action. Often used to describe an indirect effect or an unintended outcome.

- Option 1: Recollection: The act of remembering or recalling something from memory. It is not related to consequences or effects of actions.

- Option 2: Reaction: A response or effect resulting from a specific action or situation. It aligns closely with the meaning of repercussions as both involve responses to actions.

- Option 3: Rearrangement: The act of changing the order or position of something. This does not relate to the concept of consequences.

- Option 4: Reminder: Something that prompts someone to remember something. It doesn’t relate to outcomes of actions.

Given this analysis, the most suitable synonym for repercussion is Reaction.

YOUR ANSWER IS WRONG