Are you sure that it crossed 15L INR?
I believe so. Either the random newspaper could have given out incorrect information during that time, may be? or someone could have been selling bitcoin at that price in P2P exchanges like Localbitcoins? But, I am quite sure I have seen that price (which I mentioned above) being printed in an Indian newspaper on a Sunday December 2017 time.
Even now if you check in WazirX, BTC is getting traded at 14,81,000 INR and LBTC prices are 10k higher than that. And we are also well aware about Indian media which delivers half baked info regarding bitcoin as they lack the basic education to understand what bitcoin is and can't really understand much above a stock market scheme.
BTW another interesting fact is that, 1 USD was around 64 INR at December 2017 i.e $19,783 (practical ATH of
BTC as per
fortune data) brings the price to 12,66,112 INR and I am not sure how BTC was trading at these insane levels in Indian exchanges? Were we paying 1,75,000 extra for buying btc in India? I agree with Supply and Demand ratio, but paying $2,700 per btc is too much to say.