Choose the correct alternative to change the following Assertive sentence into an Exclamatory sentence.

I wish I had met you ten years ago.

If only I had met you ten years ago!

The correct alternative to change the given Assertive sentence into an Exclamatory sentence is (2) "If only I had met you ten years ago!"

An exclamatory sentence is used to express strong emotions, wishes, or surprise. In this case, option (2) expresses a strong wish or desire to have met the person ten years ago, and the use of "If only" makes it an emphatic exclamation. It conveys the idea of a missed opportunity or a strong longing, which is appropriate for an exclamatory sentence.