53 acres in the hands of B is ancestral property. B after death A adopted C. C has four sons, D, E, F & G. B has no right to exclude C from ancestral property. B as adoptive mother of C has only 1/5 share in the ancestral property with C, D, E, F & G. Any transfer of property excluding C is invalid and liable to be cancelled. The very transfer of property is illegal, there is no question of any procedural irregularity. Challenge the transfer of property before Tahsildar as all transfers are without notice to you. You can file appeal against the order of Tahsildar and than writ directly in High Court seeking correction in revenue record as they were before transfer. After that file a suit in court for partition of property. Procedure is time taking but you wil get your share.