Sons are of twelve kinds: (1) one’s own coborn; (2) son of the daughter; (3) one born of his wife by another; (4) one born of an unmarried girl; (5)“One born of a woman who is remarried; (6) one given away in adoption; (7) one bought from the parents; (8) one treated as a son because of his good qualities; (9) one who comes to another as a son because he is an orphan or abandoned by his parents; (10) the son of a woman pregnant before marriage; (11) one born secretly of the wife of another; and whose identity cannot - be determined; (12) one abandoned by its parent or parents and is brought up by another. Of these twelve, only one and six are approved. The rest are not allowed in kaliyuga.