Intraday trading refers to buying and selling the stock on the same day. The selection of the stocks for intraday trading plays a vital role to get a handsome profit. For, intraday trading, you should select the stocks from the sectors which are most active. The selection of the stock is your decision; you can select the most active stock from the most active sector.
Selecting a particular sector for intraday trading is not a good decision because every day you can see that the different sectors are in the list of the most active sectors. You can know which sector is most active today by visiting NSE India Website. Go to the index section. https://nseindia.com/live_market/dynaContent/live_watch/live_index_watch.htm. Visit this page every day before you start intraday trading for today, here you can find out which sector is most active on that day.
You can not do intraday trading only and only based on sectors because there are important factors for intraday trading that you should consider for your day trading.