@dhiraj.gehlot94 Unfortunately I do not think there is a built in way to do it for only one pad of your choosing. If someone else knows of a way, I am all ears too. I think you are stuck with manually drawing out the shape or write your own ULP to do this.
There is an ULP (that's from 2012) that does teardrop for all pads in your design however be careful using it. Depending on the number of pads and vias you have on your PCB, this process can take a long time and I have not found an efficient way to undo this process. Also running this ULP more than once will result in tear drops being added multiple times to the same pad (the old one is not removed or ignored) and eagle will start chugging along to the point you won't be able to even move a component around
