I am looking to buy a Bitcoin miner. I am from india. So I want to ask , will it be profitable to buy a bitcoin miner set and start a mining business in India ?
That all depends on your local electricity costs, including cooling costs. It may also be determined by the rates offered at the exchanges you have access to.
I don't know of any India-specific mining profitability calculators, but here's one that calculates based on US dollars. You could probably convert your costs to dollars and come up with a reasonable answer.