In the following question, a sentence has been given in Direct/Indirect speech. Out of the four alternatives suggested, select the one which best expresses the same sentence in Indirect/Direct speech.
'Why don't you see a doctor?' said Mrs. Lal to Nina.

• Mrs. Lal asked Nina why she could't see a doctor.

• Mis. Lal demanded why Nina did't see her doctor.

• Mrs. Lal advised Nina to see a doctor.

• Mrs. Lal advised Nina to see a doctor.