it vs that

Hello :slight_smile:

Could anyone tell me if both sentences are right? If they are, please tell me what the differences are when it comes to their meanings.

The situation is, somebody is asking me about a process in which I have limited knowledge. Which of the following responses is right

A: I’m afraid, I’m not absolutely familiar with it.
B: I’m afraid, I’m not absolutely familiar with that.

Thanks :slight_smile:

Both are fine. Two ways of saying the same thing.

I’d feel that in the above example covers a little wider usage than it. For example, that can refer to either the thing or subject previously mentioned, or the whole statement previously made by the other party in the conversation, whereas it can only refer to the former.