Chart data differnence between listing date and chart date

Dear Team,

I am looking for monthly chart of TORRENTPHRAM , which is available from 1996, but in NSE website mentioned that, it was listed from 25-Nov-2002. Before listing, how the chart is available.

Can you please clarify me?

TORRENTPHRAM-EQ was trading from 1996 itself, you can check the bhavcopy data from this Link

Thanks, but in the below link they have mentioned as 2002 listing in NSE. Where can we get from stock started to trade.