shares bought in bse ..but it is reflecting in nse

Hello I have bought 100 shares on bse exchange at 3.46 rs each …but today I am checking shares are in nse 2.8 rs each…can anyone explain

The same stock can trade on both the exchanges. Once you have bought the shares it shows up in your demat account without any tag of where you have bought. You can then sell it on any exchange you want. By default on Kite holding page we show the NSE price. But you can add the stock on BSE on your watchlist and place a sell order from there.