I searched a lot for this in Google, but no hope, how to check the OS version of Bluestacks emulator in Windows? There is a video in YouTube for checking bluestack version, but not the Android version used in it.
I went to settings – > Advanced settings, but there was no tab corresponding to About tab which is found in an Android emulator like in the case of Genymotion emulator.
Install Terminal Emulator from Play Store, open the application and type:
getprop ro.build.version.release
you will get something like: 4.4.4 for KitKat.
or
getprop ro.build.version.sdk for getting the sdk version which will return 19