I Googled it and there were some results like Emulators etc,so Do I have to download an emulator?
If yes ,Which one is best ( links please).
And one more thing, is it possible to run apps of Latest Android OS on PC (like Honeycomb 3.0 etc)?
There are many softwares available to run android apps on windows. But what i sugguest is "DuOS-m" It's because it gives much better native android experience than bluestacks, genymotion, or windroy. It is perfect solution for running whats app, zombie tsunami, angry birds, temple run, glow hockey, stick tennis and a variety of androids apps on windows.