This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bone, Subject name: Orthopaedics
Most vascular part of bone :(Repeat Kerala 2007) 
Select and explain. 
A. Epiphysis, B. Metaphysis, C. Diaphysis, D. Periosteum
B: Metaphysis
Answer: B: Metaphysis 
Explanation: Ans) b ( metaphysis) Ref: Maheswari 3ed 157Metaphysis is the most vascularised zone of the bone due to which it becomes a favorite site for osteo-myelitis.In metaphysic vessels are arranged in the form of loop (hair pin arrangement)Blood stasis ;bacteria settleMost common site for osteomyelitisStrongest part of bone -Diaphysis