whether the property is beanmi or not

1. i am nagaraj rao chartered accountant , mysore. hindu 2. query :whether the below-discussed property is absolute property of my mother or family property ? details :my father Sri c h 1934 born: died in 2015.: Govt servant, He . married my mother Vani bai in 1962. 3. 2 sons and 2 daughters were born. my biological younger brother has been given off in adoption in 1983. deed registered in Subregistrar office. 2 sisters are married. 4. in 1972 Ch rao bought a property : he took a loan of 25k, the property sale consideration . it was registered in my mothers name; 5. my mother was a house wife. she did not have any source of income . 6. my father died intestate: he died in that house 7. it was used for residence of the full family. mother did not derive any rent/ any other benefit therefrom 8.my biological brother, is trying to get a settlement deed in his favor by my mother, that it is her abs. property 9. whether it is benami_ thus family property or my mother's absoute ?