Fill in the blank with the correct article: He is _____ honest man.

Correct option is B

Rule for Articles:

• "An" is used before words that begin with a vowel sound (a, e, i, o, u).

• "A" is used before words that begin with a consonant sound.

• "The" is used for specific nouns that both the speaker and listener are familiar with, which doesn't fit in this context.