Property Title Advice

1. Mr X purchased a land in 1952 in Delhi.Mr. X is have 2 sons and 2 Daughters I.e. Elder Son A Younger Son B Elder Daughter A Younger Daughter B 2. Before 1965 Mr X was living with Younger Son B. 3. In 1965, Elder Son A came to Delhi because he was suffering from Cancer. He was having 2 Legal Heirs i.e. Elder Daughter AD and Elder Son AS. Elder Son A Started Living in the 1/3 of the Property 4. In 1967, Mr. X done a Registered Will in the Name of his Wife Mrs Y. in WILL, he stated that after my death the whole property will belong to her and if she wants she can give the Property to Legal Heirs 5. In 1968, Elder Son A died as he as suffering from Cancer and Mrs Y(Wife of Mr X and) died. 6. In 1969, Mr. X done a another Registered Will invoking the Previous WILL which States that A. Whole Property Owner is Younger Son B B. Legal Heirs and Wife of late Elder Son A will be living as License in 1/3 of Possession and Can be Evicted anytime by younger Son B. Younger Son B was treated