Pick out the correct sentence:

Option B is incorrect as we cannot use the plural form after an article. The correct sentence should be ' The student uses a lot of inks.'

Option C is incorrect as we use the article 'an' before ink. Ink is a vowel-sounding noun, and the article 'an' is used before ink.

Option D is incorrect as ink is an uncountable subject; instead of have, 'has' should be used. The correct sentence should be 'Has your ink finished?'.

Option A is grammatically correct.

Answer is option A.