law: Constitution of India, 1949 
     5.Citizenship at the commencement of the
  
  Constitution.- 
  At the commencement of this Constitution every
  
  person who has his domicile in the territory of India and - 
  (a) who was born in the territory of India; or
  
  
  (b) either of whose parents was born in the
  
  territory of India; or
  (c) who has been ordinarily resident in the
  
  territory of India for not less than five years preceding such commencement,
  
  shall be a citizen of India.