Registration of property by heirs - granddaughter's stake as heir

A died intestate leaving immovable property. His wife expired. He has B & C as sons. They divided the property by agreement (un regd) B has two sons and a daughter and C has two daughters. B also died. B's wife, 2 sons and C executed a registered partitition deed among themselves. Schedule A property to B's heirs and Schedule B property to C. The daughter of B orally relinquinshed and signed the deed as witness. Times changed. Now she ( the daughter) is disputing that she should also have share in Schedule A property as it is being sold by B's sons and their 4 children after the death their mother/grandmother. How far the claim of B's daughter for a share is valid. We are HINDU.