Greetings,

You being an OCI card holder must mean that you have the citizenship of some country other than India. Such citizens who are children of OCI or are themselves OCI come under the category of Person of Indian Origin (PIO)

so in short,

- select Indian if you have an Indian citizenship and live in India

- PIO if you are a citizen of some other country and are living in India (once you get citizenship elsewhere your Indian citizenship ceases to end)

- and NRI if you are an Indian citizen who lives outside India for more than 180 days in one year.

Hope it helped,

good luck!