Correct Answer: She said that it was her birthday the following week.

Solution : The correct option is the third option.

Reported speech involves conveying what someone else has said.

The steps of conversion are as follows:

• Said remains as the reporting verb.
• It is changed to it was because of the shift from the present tense to the past tense.
• My (first-person pronoun) changes to her (third - person pronoun) to reflect the change in perspective.
• Next week is changed to the following week, unless the context of the reported speech changes the timing reference.

Therefore, the converted sentence would be: " She said that it was her birthday the following week."