Daughter (C-younger) born in 1964 claiming on brother's self-acquired property in Karnataka.

They are 2 brothers (A-elder & B-middle) and 1 sister (C-younger). Person B brought (self-acquired) agriculture land in 1983 before brothers executed any partition deed. Person C was born in 1964 and got married around 1980. We purchased the self-acquired land from Person B in 2008. Both the brothers executed partition deed after 2008 whereas they have not mentioned the self-acquired property of Person B in their partition deed which we have purchased. Both the brothers know that that property was self-acquired by Person B (younger brother). Person C who is already married in 1980s with the help of brothers A & B has filed a case against their partition deed in 2017 for equal rights based on 2005 Equal Rights Act for Women. She is also asking for the claim on the self-acquired property of Person B which is also not added in the partition deed of brothers. Please suggest whether she who born in 1964 and married in 1980 and living with her husband in different place really has rights on the self-acquired property of a brother (Person B). Requesting your valuable suggestions at the earliest.