Single citizenship and the OCI question
India does not recognise dual nationality. Voluntarily acquiring another citizenship means surrendering the Indian passport and obtaining a surrender certificate, after which OCI status can generally be applied for. OCI provides lifelong visa-free entry and most residence and economic rights, but it is not citizenship and it excludes voting, public office and certain agricultural land ownership.
For families who are not ready for that, investor residence permits are the more common answer, because they add rights without removing any.
