India doesn’t allow dual citizenship, so how does that factor into things?
2) By Descent (Section 4)
A person born outside India on or after 26th January 1950 but before 10th December 1992
is a citizen of India by descent, if his father was a citizen of India by birth at the time of his birth. In case the father was a citizen of India by descent only, that person shall not be a citizen of India, unless his birth is registered at an Indian Consulate within one year from the date of birth or with the permission of the Central Government, after the expiry of the said period.
A person born outside India on or after 10th December 1992 but before 3rd December, 2004, is considered as a citizen of India if either of his parents was a citizen of India by birth at the time of his birth. In case either of the parents was a citizen of India by descent, that person shall not be a citizen of India, unless his birth is registered at an Indian Consulate within one year from the date of birth or with the permission of the Central Government, after the expiry of the said period.
A person born outside India on or after 3rd Decmber, 2004 shall not be a citizen of India, unless the parents declare that the minor does not hold passport of another country and his birth is registered at an Indian consulate within one year of the date of birth or with the permission of the Central Government, after the expiry of the said period.