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. "How old is your grandmother?", Navneet asked her.

• Navneet asked her how old her grandmother is.
• Navneet asked her how old her grandmother has been.
• Navneet asked her how old her grandmother was.
• Navneet asked her how old is her grandmother.