Which sentence is punctuated correctly. a. lila drove to work today, but maurice walked in the rain b. jamarius rode his bike but amber skateboarded

The correct answer is A.

Both of them are two sentences liked by a contrasting conector. The first option is punctuated correctly because it presents a comma separating the sentences, unlike the second option. The first option is also ended with a full stop whereas the second one is unfinished.

be more specific with your question.

they would have to clean it very clean