Urgent Information needed for traveling to India

Hi,

I have got my British passport recently, and I wish to travel to India using Indian passport with in the grace period, I have some queries regarding travel, I know these questions might have been asked several times, but I could not find proper answers , so am writing back again.

1)when I enter India using Indian passport , I need to fill customs form, there what do I write I am Indian citizen or British Citizen ?

2)when I do exit from India using Indian passport, what do I fill in the immigration form, Indian citizen or British citizen ?

3)When I enter UK, should I use Indian Passport/ILR or British passport ? which one is better to use ?

4)If I use British passport while entering UK, will I have any problem later on surrendering Indian passport or getting OCI ?(as my Indian passport will not have UK entry stamp).

I have been searching for the answers for long time , I would much appreciate if I get replies. Please do help me out with the answers

Thanks

Ramesh

1, 2 - indian passport as an indian , return show ILR BRP
3 - British, use eGate
4 - No

Thanks a lot ban.s for your prompt reply and the help.