Correct Answer:
Option D - 'A', 'An and 'The' are articles. Where 'a' is used before the words which starts to consonant 'An' is used before the words which starts to vowel (a, e, i, o, u) and 'The is used for definite thing, so it is called definite article.
D. 'A', 'An and 'The' are articles. Where 'a' is used before the words which starts to consonant 'An' is used before the words which starts to vowel (a, e, i, o, u) and 'The is used for definite thing, so it is called definite article.