Conjunctions are used in a sentence to _____.

What is Conjunction?
We use and, or and but to connect two parts of sentences which are similar in grammatical status.

অর্থাৎ,
সাধারণত conjunctions বলে সেই শব্দগুলোকে যেগুলো বাক্যের দুটি অংশ কিংবা দুটি বাক্যকে একত্রিত করতে সাহায্য করে। যেমন: like and, or, but, because and although.

এছাড়াও,
Conjunctions ব্যবহৃত হতে পারে,
- To give more information. Example: I'm OK with food, dance and music, and I'm having a wonderful time.
- To give alternatives. Example: Do you want chocolate, strawberry or vanilla?
- To give unexpected or different information. Example: She’d like to go but she can’t.
- To give reasons. Example: I would like to go to the concert, because I'm a diehard fan of Sami Yusuf.
- To give results. Example: It's one of those cars for seven people, so there's plenty of room.

সুতরাং সঠিক উত্তর হবে, All of the above.

Source: CLIFF'S TOEFL