Identify the sentence that correctly uses the indefinite article.

Correct option is B

The correct use of the indefinite article in English depends on the sound that begins the following word.
• If the word starts with a vowel sound, "an" is used; if it starts with a consonant sound, "a" is used. In the given options, the word "apple" starts with a vowel sound, so "an" is the appropriate article.
• Option (b) "She purchased an apple in the market with me," correctly uses "an" before "apple."
• The other options either incorrectly use "a" before a vowel sound (a, d) or omit the article altogether (c), which is not grammatically correct in this context.
• Therefore, the correct option is (b).

Grammar Rule:

• Use "a" before words that begin with a consonant sound.
• Use "an" before words that begin with a vowel sound.