I tasked with Zerodha, Angel one, 5Paisa etc. and what they say:- Zerodha: only demat account can be opened only if Guardian/parent already have account with them. procedure will be online. Angel One: same as Zerodha but procedure is offline. 5Piasa: no option for minor account at all.
recently found prostocks.com and they only minor account can be opened which is also online. seems good for me. I will try to open it soon.
DOES ZERODHA OR UPSTOX OPEN MINOR TRADING AND DEMAT ACCOUNT