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
Freiberg's disease is a recognised osteochondritis which affects which of the following? 
Select and explain. 
A. Head of 2nd and 3rd Metatarsal, B. Lunate bone, C. Hip, D. Navicular bone
A: Head of 2nd and 3rd Metatarsal
Answer: A: Head of 2nd and 3rd Metatarsal 
Explanation: Names of some osteochondritis and the affected area is given below: Frieberg's disease - Head of 2nd and 3rd metatarsal Pehes disease - Hip Kienbock disease - Lunate bone Kohler's disease - Navicular bone Ref: Oxford Handbook of Clinical Specialities, 8th Edition, Page 702.