Rewrite the sentence given below with the suitable usage of pronoun.
This is the paragraph about ____ the teacher is talking about. It is supposed to be very difficult.
1
This is the paragraph about that the teacher is talking about. It is supposed to be very difficult.
2
This is the paragraph about which the teacher is talking about. It is supposed to be very difficult.
3
This is the paragraph about where the teacher is talking about. It is supposed to be very difficult.
4
This is the paragraph about when the teacher is talking about. It is supposed to be very difficult.