Hi Babu,
In your snapshot, pull Project Name out of the rows section in the Ad-Hoc Query Configuration Box. You'll see the NSSR to Projects Stage object fall out of the top of the box and the table will show an error (only because there's no grouping rows, we'll fix that with the next step).
Then go into the Data perspective and grab Project Name from the Projects Master Data and put it into Rows where it was before.
The table will no longer be a drill at this point (confirm by seeing only Projects listed in the top section of the ad hoc query box).