The following sentence has been divided into three segments, A, B, C. One of them may contain a grammatical error. Select the segment that contains the error, from the given options. If you don’t find any error, mark ‘No error’ as your answer.
He is not rich (A) / so he cannot afford (B) / to buy a expensive car (C).

Correct option is A

Option (A) contains an error.

Explanation:
The error lies in the use of "a" before the word "expensive", which begins with a vowel sound.

According to the rule, we use "an" before a word that begins with a vowel sound (a, e, i, o, u). The correct phrase should be "to buy an expensive car."

Grammatical rule used:
Use "an" before words starting with vowel sounds and "a" before consonant sounds.
Correct: an apple, an hour, an umbrella
Incorrect: a expensive mistake

Example:
He wants to buy an expensive watch for his brother.

Information Booster:

• It is the sound, not the letter, that determines the article:
• "a university" (because "university" begins with a /ju:/ sound)
• "an honest man" (because "honest" begins with a silent 'h')