My grandmother is not educated and cant hear. in 2008 she registered a land of 5 bigha to a person for only Rs 30000/-. No one else from the family did not know. The person who bought took the advantage of our absent and her innosense. The land was her ancestral property and was in her mothers name. My father died 30 years back.My grandfather died 10 years back. I am the only ancestor now. The land record is still in my grand mothers mother name. Can I demand this property back giving back the money?