Can someone help me pls!!!

Read this run-on sentence.

Rajeet opened the window he loved the smell of a rainstorm.

Which of the following makes this sentence correct?

Rajeet opened the window, he loved the smell of the rainstorm.

Rajeet opened the window he loved the smell, of the rainstorm.

Rajeet opened the window: he loved the smell of the rainstorm.

Rajeet opened the window; he loved the smell of the rainstorm.