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
Postero lateral anconeus triangle is formed by 
Select and explain. 
A. Head of radius, lateral epicondyle, medial epicondyle, B. Head of radius, lateral epicondyle, olecranon, C. Olecranon, medial epicondyle, neck of radius, D. Neck of radius, head of radius, lateral epicondyle
B: Head of radius, lateral epicondyle, olecranon
Answer: B: Head of radius, lateral epicondyle, olecranon 
Explanation: B i.e. Head of radius, lateral epicondyle, olecranon Radial head, lateral epicondyle and tip of olecranonQ form a triangle over the posterolateral aspect of elbow joint. This space is occupied by anconeus inuscle(2 and so known as anconeus triangle.