This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Orthopaedics
Tom Smith Ahritis 
Select and explain. 
A. Pyogenic Infection of infancy, B. TB, C. Rheumatoid ahritis in children, D. Osteoahritis in Middle aged men
A: Pyogenic Infection of infancy
Answer: A: Pyogenic Infection of infancy 
Explanation: Tom Smith ahritis is the septic ahritis of the hip joint, occurs in infancy. At this stage head of the femur is cailaginous and is rapidly and completely destroyed by the pyogenic process(Refer: Mohindra's Fundamentals of Ohopedics, 2nd edition, pg no. 289)