Which of the following is a properly punctuated compound sentence?

Gillian and Jackie are having a board game night even though Jackie doesn't like games.
Gillian enjoys board games and Jackie does not.
Gillian wanted to host a board game night, but Jackie does not enjoy board games.
Gillian want to host a board game night Jackie does not enjoy board games.

Gillian wanted to host a board game night, but Jackie does not enjoy board games.

The properly punctuated compound sentence is: "Gillian wanted to host a board game night, but Jackie does not enjoy board games."

To determine which of the given options is a properly punctuated compound sentence, we need to understand what a compound sentence is and how to punctuate it appropriately.

A compound sentence is a sentence that includes two or more independent clauses. These independent clauses are complete thoughts that can stand alone as separate sentences. To properly punctuate a compound sentence, we usually use a coordinating conjunction (such as "and," "but," or "or") to join the independent clauses together.

Now, let's analyze each option:

1. Gillian and Jackie are having a board game night even though Jackie doesn't like games.
- This sentence contains two independent clauses: "Gillian and Jackie are having a board game night" and "Jackie doesn't like games."
- It is correctly punctuated with a coordinating conjunction ("even though") to join the independent clauses. Therefore, this option is a properly punctuated compound sentence.

2. Gillian enjoys board games and Jackie does not.
- This sentence also contains two independent clauses: "Gillian enjoys board games" and "Jackie does not."
- It is correctly punctuated with a coordinating conjunction ("and") to join the independent clauses. Thus, this option is a properly punctuated compound sentence.

3. Gillian wanted to host a board game night, but Jackie does not enjoy board games.
- This sentence consists of two independent clauses: "Gillian wanted to host a board game night" and "Jackie does not enjoy board games."
- It is correctly punctuated with a coordinating conjunction ("but") to link the independent clauses. Hence, this option is also a properly punctuated compound sentence.

4. Gillian wants to host a board game night Jackie does not enjoy board games.
- This sentence seems to be missing a coordinating conjunction between the two independent clauses: "Gillian wants to host a board game night" and "Jackie does not enjoy board games."
- Without a coordinating conjunction to join the independent clauses, this sentence is not properly punctuated as a compound sentence.

Therefore, the only option that is a properly punctuated compound sentence is:

Gillian and Jackie are having a board game night even though Jackie doesn't like games.