I want to buy BTC in international exchanges from India, as in India there is a restriction imposed on cryptos for some time. So please suggest some platforms which allows bitcoin for INR or for USD that can be transferred from India, or any NRI who had any bank account in India, so that he can provide bitcoin and cash can be deposited into his account in India.
There is no restriction imposed as of now, but the Government of India is reviewing the digital currency and may soon frame some laws and rules. In fact they have asked for public opinion on it too. I would suggest you purchase from some local person or registered business to avoid FEMA violation.