This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thigh, Knee,Leg,Foot & Ankle injuries, Subject name: Orthopaedics
[{'content': 'Frieberg osteochondritis is INFLAMMATION of ? \nSelect and explain. \nA. 2nd metatarsal head, B. 2nd metatarsal base, C. 5th matatarsal head, D. 5th metatarsal base', 'role': 'user'}, {'content': 'Answer: A \nExplanation: FREIBERG INFRACTION * Osteochondritis of the second metatarsal head. But may also involve 15t 3rd and 4th metatarsal heads * Usually occurs following trauma. * A misshapen metatarsal head frequently is an incidental radiographic finding, and careful questioning of the patient often reveals a period during adolescence when pain was noted in the forefoot. ref : maheswari 9th ed', 'role': 'assistant'}]