Choose the best option to convert the given Exclamatory sentence into and Assertive sentence:-

If only i had a good car!

I wish I had a good car.

The correct answer is Option (3) - I wish I had a good car.

The best option to convert the given exclamatory sentence "If only I had a good car!" into an assertive sentence is:" I wish I had a good car."

The original sentence expresses a wish or desire (exclamatory sentence).
The assertive sentence "I wish I had a good car" directly conveys the same wish without the exclamation mark but retains the meaning and sentiment of desiring to have a good car.