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If you google the btc rate in USD and multiply it by 64.5 to get INR, the value will be lesser than the buying rates on zebpay or any exchange in India. This rate also varies from market to market and exchange to exchange, for example the current BTC rate in usd is 2600, but bitcoin ATMs sell it for somewhere around 3300 dollars.
The only thing you can check is among the exchanges in India and among those exchnages what is the transaction fee and processing time, basis this you can select your exchange

can you sugest which one is best coinsecure? or zebpay

You should consider coinsecure over zebpay
Reason 1- the difference in buying and selling is at same rate in coinsecure while there is a difference of almost 7000 rs in buying and selling price on zebpay

Reason 2- you can view the live exchanges/trading on coinsecure and not on zebpay

My personal experince in terms of UI and sign up process has been almost same in both the sites, but make your decision after visiting and reading the content on both sites. Good luck !!