*Correct Answer Explained! ✅*
The correct answer is *"had"* (If I *had* enough money, I would buy a car).
*Why? 🤔*
This is a Second Conditional sentence. We use it to talk about imaginary or hypothetical situations in the present or future.
*The Rule:*
* If + Past Simple ➡️ would + verb
* Example: If I had (past simple), I would buy (would + verb).