<prompt> All the following statements are true except?X-Rays are extranuclear in origin.Gamma Rays are intranuclear in origin.Ultrasound uses a type of Electromagnetic radiation.Velocity of X-Rays is equal to the velocity of light.  <response>: Ultrasound waves are sound waves,not electromagnetic waves. Ultrasound waves travel with a velocity of 1540ms in human tissues. All Electromagnetic radiations like X rays,Gamma Rays,Infrared waves travel with the same velocity i.e. the velocity of speed of light 3 x108ms. Wavelength of Xrays is 0.1-100 Angstrom. 