Correct Answer: The teacher said to me, "Why did you reach the examination hall so late?"

Solution : The third option is correct choice.

In direct speech, the words of the speaker are directly quoted in quotation marks.

Narration Conversion:

• The reporting verb asked is changed to said in the direct speech.
• The reported speech is directly quoted within quotation marks.
• Had reached is changed to did reach to match the tense of the reported speech correctly, as the past perfect tense is changed to the simple past tense.
• The first-person pronoun I is changed to the second-person pronoun you .

Therefore, the sentence in direct speech is: The teacher said to me, "Why did you reach the examination hall so late?"