Which is right and why - I never drink wine. wine.?

The correct sentence is: "I never drink wine."

Here's why:

* "Wine" is a noun, and it's the object of the verb "drink". In this case, it's understood, but not explicitly stated, that "wine" is the thing being drunk.

* The sentence is grammatically complete without the extra "wine". Adding another "wine" would be redundant.

The sentence "I never drink wine. wine?" sounds awkward and confusing. It's unclear what the second "wine" is supposed to refer to.