Hi sir,I'm from Hyderabad.my grand father has three sons one daughter.I'm daughter of his elder son.when grand father is alive he gave property to all including grand mother.each of 1/2 acre.my grand mother and his one son sold 1acre after grnad fathers death.after few years my father and middle son and daughter made aggreement to sell and took advance.before registration my father died.now all of them are asking my fathers land to give them including my grand mother who sold their land before.why because my father has no sons.only daughter.is it possible to sell the land without daughters signature .and whom will be the right for that land.