Is it grammatically correct to say: "Answer it"? [closed]

Solution 1:

"Answer it." or "Answer it!" are both valid sentences on their own in the imperative mood. It is asking for a response to something (e.g. a question, a ringing phone, a doorbell, etc.)

"Answer this" usually appears before a question. That question would be a part of the same sentence after a colon. The question often needs no response. It simply wants the listener/reader to think about the question.

Answer this: why would they learn how to speak English at a bad school?

"Answer this!" is also a valid sentence. There is something happening close by and the speaker/writer wants the listener/reader to respond to it immediately.

(A doorbell rings. The speaker says to someone while pointing at the door in front of them) Answer this!

"Answer that!" is another valid sentence. There is something happening relatively far away and the speaker/writer wants the listener/reader to respond to it.

(A phone rings. The speaker says to someone while pointing at the phone across the room) Answer that!

"Answer that." or "Answer that!" would also appear after a question that was presented before. This short sentence urges the listener/reader to respond to the question.

"Why would they learn how to speak English at a bad school? Answer that!"