Find the odd one out regarding the Citizenship Act :
1) If he has been ordinarily resident in India for five years immediately before the commencement of the Constitution, he became a citizen of India.
2) A person who migrated to India from Pakistan became an Indian citizen if he or either of his parents or any of his grandparents was born in undivided India.
3) A person who migrated to Pakistan from India after March 1, 1947, but later returned to India for resettlement could become an Indian citizen.
4) A person who, or any of whose parents or grandparents, was born in undivided India but who is ordinarily residing outside India shall become an Indian citizen