Correct Answer:
Option C - Reported speech of the direct sentence is past indefinite tense.
Rules to make Indirect Speech-
1. Conjunction 'that' will be used in place of comma and inverted comma.
2. According to narration rule tense and pronoun will be changed.
Correct Sentence -
He said that he had bought that book for his brother
C. Reported speech of the direct sentence is past indefinite tense.
Rules to make Indirect Speech-
1. Conjunction 'that' will be used in place of comma and inverted comma.
2. According to narration rule tense and pronoun will be changed.
Correct Sentence -
He said that he had bought that book for his brother