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: Surgery
What is the normal orientation of humeral head - 
Select and explain. 
A. Retroversion of 80 degrees, B. Retroversion of 30 degrees, C. Anteversion of 15 degrees, D. Anteversion of 50 degrees
B: Retroversion of 30 degrees
Answer: B: Retroversion of 30 degrees 
Explanation: Answer- B. Retroversion of 30 degreesNormal humeral retroversion is 25-35 degrees.Normal femoral anteversion is 8-15 degrees