My father and two of his uncles(grandfathers brothers) bought a property some 50 years ago since they lived together in a joint family. At the time of purchase my father was, 19 years old and in college. Now all three have died and dispute has started between the three families. They claim that at time of purchase my father was in college and had no source of income. They are now disputing my right to property on this basis. Although the source of money involved in the purchase is completely unknown for all three people involved in the transaction. This purchase was made well before I was born. Can their claim hold in the court of law.