Should I sell my flat and invest to earn interest, or keep it and earn rent in my retirement?

ET Wealth Reader's Query: I own a two-bedroom flat in Bengaluru, which is about 10 years old, and have no outstanding loan. I am a senior citizen with pension income and live with my son. Should I retain the property and earn rental income, or sell it and invest the proceeds in fixed deposits for a steady interest? Currently, my annual income is below Rs 12 lakh, so I am not liable to pay any tax.