Sharp pain radiating from inner pelvic bone to knee?

Groin pull. There are a number of causes of this pain. It could be from a strain on your aductor muscles in your leg. Particularly the aductor magnus or the gracilis muscles. These muscles attach in the area of your pelvic bone. Try crossing your legs and see if you have the pain? Also does it hurt over your pubic bone? Does it hurt when you walk. And it could be from your lumbar disc disease?