1. You can't buy alcohol until you are twenty years old.

Question

2. You can't buy drinks until you are twenty years old.

3. You can't buy wine until you are twenty years old.

4. You can't buy beeer until you are twenty years old.

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Are they all grammatical? Which one is the correct term which is used in general?

Answer 1

All are correct, except for the typo -- beer (2 e's!).

The one used in general is #1.