NEW DELHI, June 18 : India privately rebuked Telegram for not proactively removing accounts offering purported leaked exam papers while the company accused New Delhi of misrepresenting meeting records, an impasse that led to an unprecedented ban of the app, documents show.   Telegram has challenged the ban by Prime Minister Narendra Modi's government in the Delhi High Court. The government invoked emergency powers to block Telegram in the country until June 22 amid concerns the platform was