<prompt> Roof of anatomical snuff box is formed by:Cephalic vein and superficial branch of radial nerveBasilic vein and superficial branch of radial nerveCephalic vein and radial aeryBasilic vein only  <response>: - Roof of anatomical snuff box is by cephalic vein and superficial branch of radial nerve . - The pulse of the radial aeryis palpable in the floor of the snuffbox against scaphoid bone. - Boundries of Anatomical snuff box- Posteromedially ulnar border -extensor Pollicis longus Anterolaterally radial border -extensor pollicis brevis and abductor pollicis longus. Floor-scaphoid,trapezium,base of 1st metacarpal and styloid process of radius. Content - radial aery Pulse can be felt by palpating radial aery against scaphoid bone. 