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
[{'content': '24 yr old woman walking up experiences pain in heel which decreases on walking down. X-ray shows bone spur. Diagnosis ? \nSelect and explain. \nA. Plantar fasciitis, B. Calcaneal exostosis, C. Osteomyelitis of calcaneum, D. Achillis tendinitis', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Achillis tendinitis Heel pain when walking up hill or up stairs is typical of Achillis tendinitis. Other three options can also cause heel pain, but pain in these conditions has no relation to going up or down. It is consitent throughout.", 'role': 'assistant'}]