Articles 5 to 11 comprise Part II of the Constitution, dealing specifically with citizenship.
Either of the person's parents was born in the territory of India.
According to IndianKanoon , this article stipulates that every person who has their domicile in the territory of India and fulfills any of the following criteria is a citizen of India: The person was born in the territory of India.
This article was designed to grant citizenship to residents, including those migrating back during the Partition, provided they had a settled home (domicile) in India.