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: Orthopaedics
Angle formed by joining a line extended from fracture line of fracture neck to an arbitrary line depicting horizontal plane 
Select and explain. 
A. Shenton's line, B. Pauwel's angle, C. Perkins line, D. Nelton's line
B: Pauwel's angle
Answer: B: Pauwel's angle 
Explanation: None