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': 'Stress fracture not involves - \nSelect and explain. \nA. Metatarsals, B. Metacarpals, C. Tibia, D. Calcaneum', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Amongst the given options, metacarpal is the least common site.\nWith few exceptions, fatigue or stress fractures are confined to the bones of the lower limb.\nThree most commonly involved bones are metatarsal, fibula and tibia in that order.\nOther bones may also be involved like the neck of the femur, femur shaft, medial malleolus, tarsal, navicular, calcaneum.', 'role': 'assistant'}]