where to get interest rate, volitality of stock data????!!!

Please help me, I have read many books on options and am trading equity at present.
I want to know from where to get the data relating to the stocks volatility , dividend rate and interest rate which are need for calculation of options.

PS. PLEASE DO NOT TELL GO TO nse website as it is a very big site.
on nse site there is annualised and daily volitality. but which one to use.

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