Section 2(b)

(b) any child, legitimate or illegitimate, one of whose parents is a Hindu, Buddhist, Jaina or Sikh by religion and who is brought up as a member of the tribe, community, group or family to which such parent belongs or belonged; 3* * * 4[(bb) any child, legitimate or illegitimate, who has been abandoned both by his father and mother or whose parentage is not known and who in either case is brought up as a Hindu, Buddhist, Jaina o r Sikh; and]