1 is grammatical but 2 is supposed to read as "I am not so rich in the present" not "at present" and 3 is fine.
"At the present" wouldn't make much sense (To me)
Hope that helps :^)
Answer:

No, the correct answer will be:
✏ <u>No liquor is allowed here, is it?</u>
If the question was - 'Liquor is allowed here, is it?', then the answer will be Liquor is allowed here, isn't it?
ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ

Answer: maybe a opening statement? May want to get another opinion
Explanation:
Both works have similar plots, I'm sure about that