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
[{'content': 'Olecranon process of ulna helps in formation of? \nSelect and explain. \nA. Radial notch, B. Trochlear notch, C. Olecranon fossa, D. Coronoid fossa.', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Trochlear notch Inner surface of olecranon process forms trochlear notch for aiculation of trochlea of humerus. Radial notch is seen in lateral pa of upper end of shaft (not on olecronon). Olecranon fossa and coronoid fossa are pa of lower end of humerus.", 'role': 'assistant'}]