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
[{'content': "An army recruit, smoker and 6 months into training started complaining of pain at posteromedial aspect of both legs. There was an acute point tenderness and the pain was aggravated on physical activity. The most likely diagnosis is - \nSelect and explain. \nA. Bearger's disease, B. Gout, C. Lumbar canal stenosis, D. Stress fracture", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Information in this question are :-\n\n\nPatient is an army recruit with 6 months training\nComplaining of pain in lower limb\nPain aggravates with activity\nPoint tenderness\n\n\nThese suggest the diagnosis of fatigue (stress) fracture.\nStress fracture usually occur after a recent change in training regimen has taken place. Especially professional or recreational athletes and military recruits are subject to change in training intensity (increased), type of training or training circumstances (new shoes, other training surface etc) and thus at increased risk of developing a stress fracture.', 'role': 'assistant'}]