Which of the following sentences correctly uses a semicolon?

we were going to go to the movies; but jason forgot his wallet.
the curtains were shredded and all over the room; my cat looked very guilty.
do you know why we are here; me neither.
once there was a very hungry troll; but he was very kind as well.

The sentence that correctly uses the punctuation mark, semicolon (;) is, "The curtains were shredded and all over the room; my cat looked very guilty." This is an example of a compound sentence. A compound sentence consists of two independent clauses. If we use a semicolon to separate the two independent clauses, then we do not have to use any conjunctions to connect both. 

The question is b i think

What is the story? i will you i just need the story