If a person is adopted, then, he will have a share in the ancestral property in the adopted family. His rights over the property of his natural parents are automatically cancelled. In this case, he cannot ask for his share with his other brothers mentioned.
Sir, the idea it is to avoid double accretion of property to the individual who is given in adoption. Infact, earlier children used to be given in adoption with prime interest of ensuring property in the name of the children by the adopted family. If the property is not available from the adopted family, then who would give their child to another family in adoption?
I agree with view of Suchitra Ji. A son given in adoption relinquishes all rights to the property of his original family. Sec 20 Hindu succession act 1956 deals with rights of an unborn child. If the child was in womb at the death of the intestate then he as same rights as of an existing child.