Identify the segment in the sentence which contains a grammatical error.
I didn’t bought the book as I had no money.

Correct option is B

Option (b) contains a grammatical error.
Explanation:
The auxiliary “did” is already in the past, so the main verb should be in base form (V1), not past tense (V2).
· Incorrect: didn’t bought
· Correct: didn’t buy
Correct sentence: I didn’t buy the book as I had no money.
Grammatical Rule Used:
When using “did” (past form of do/does), the main verb must always be in its base form (V1).
Example:
· Incorrect: He didn’t went there.
· Correct: He didn’t go there.
Information Booster:
This rule applies to negative and interrogative sentences in past tense.