"An X" is correct, as the pronunciation of the letter X has an initial vowel sound. The choice of the indefinite article in English is purely phonetically based. Since the pronunciation of the letter X is headed by a vowel, an is the natural choice
"An X" is correct, as the pronunciation of the letter X has an initial vowel sound. The choice of the indefinite article in English is purely phonetically based. Since the pronunciation of the letter X is headed by a vowel, an is the natural choice
"An X" is correct, as the pronunciation of the letter X has an initial vowel sound. The choice of the indefinite article in English is purely phonetically based. Since the pronunciation of the letter X is headed by a vowel, an is the natural choice