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: Radiology
A lady dimple has a lytic lesion in X-ray of the upper end of the humerus. The diagnosis is - 
Select and explain. 
A. Osteosarcoma, B. Osteochondroma, C. Unicameral bone cyst, D. Osteoclastoma
C: Unicameral bone cyst
Answer: C: Unicameral bone cyst 
Explanation: Amongst the given options, unicameral bone cyst arises commonly in proximal humerus.