Select the grammatically correct form of the following sentence from the options below:
The students are studied for the exam, but they are also watching videos online.
1
The students are studying for the exam, but they are also watching videos online.
2
The student are studying for the exam, but they is also watching videos online.
3
The student was studying for the exam, but he is also watching videos online.
4
The students is studying for the exam, but they are also watching videos online.