This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
True about blood supply of scaphoid? 
Select and explain. 
A. Mainly through ulnar aery, B. Major supply from ventral surface, C. Major supply from dorsal surface, D. Proximal supply in antegrade fashion
C: Major supply from dorsal surface
Answer: C: Major supply from dorsal surface 
Explanation: Major blood supply (70-80%) of scaphoid comes through dorsal surface dorsal branches of radial aery.These dorsal vessels enter the scaphoid at or just distal to waist area and supply the proximal pole in retrograde fashion.