Circular selection tool is stuck on the cursor after pressing alt+c I am modeling a car. While modelling I pressed Alt+C instead of C for circular select tool. The circular select tool came anyway but now I'm unable to exit the tool. It has got stuck to the cursor. When I press C again the new circular tool comes over the stuck one. 

I'm not able to do anything. I pressed Alt+C again to undo it but its all in vain. So to rectify it I opened a new blender file and pressed Alt+C and same problem appears. The cursor got stuck on circular tool.



Q: What am I doing wrong?
I managed to exit it by pressing esc or by changing the selection tool in the top right.