Mr. Roy lives in . . . . . . . . village.

Mr. Roy lives in a village.

"A" is used before "village" because it refers to one village among many, and it is a general, non-specific reference. The indefinite article "a" is used before words that start with a consonant sound, like "village".

Option B: an is incorrect because "an" is used before words starting with a vowel sound, but "village" starts with a consonant sound.

Option C: the is incorrect because "the" is used for specific or previously mentioned nouns, but in this case, we are referring to a general village, not a specific one.

Option D: none of the above is incorrect because the correct article is "a".

Conclusion: The correct answer is Option A: a, as it properly introduces "village" with the indefinite article for a general, non-specific reference.