law: Hindu Adoptions and Maintenance Act, 1956 
  6. Requisites of a valid adoption 
  No adoption shall be valid unless- 
  (i) the person adopting has the capacity, and also the right, to
  
  take in adoption;
  (ii) the person giving in adoption has the capacity to do so;
  (iii) the person adopted is capable of being taken in adoption;
  
  and
  (iv) the adoption is made in compliance with the other conditions
  
  mentioned in this Chapter.