Which one is a compound sentence?

A I saw a girl singing.

B I saw a girl and she is singing.

C I saw a girl who is singing.

D I saw a girl to sing.

Correct Answer: Option B

Compound sentence-এ সাধারণত একাধিক principal clause-কে and, but, yet ইত্যাদি co-ordinate conjunction দ্বারা যুক্ত করা হয়।