Haha, actually mom used it as her investment money account and already upgraded it to super.
Dad has a account which is used occasionally now and both elder sisters use it as secondary.
Only I don't have a kotak account as I got a AU when I turned 18.
So I guess 3 accounts must be eligible and not a long procedure to check if they are.
I just don't want to waste around 1000rs just in case I don't receive CB.