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
Frieberg osteochondritis is INFLAMMATION of ? 
Select and explain. 
A. 2nd metatarsal head, B. 2nd metatarsal base, C. 5th matatarsal head, D. 5th metatarsal base
A: 2nd metatarsal head
Answer: A: 2nd metatarsal head 
Explanation: 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