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
[{'content': 'Which of the following is a feature of triple deformity of the knee joint? \nSelect and explain. \nA. Posterior subluxation of tibia, B. internal rotation of tibia, C. Medial angulation of tibia, D. Recurvatum', 'role': 'user'}, {'content': "Answer: A \nExplanation: Triple deformity of knee refers to:-Flexion of kneeExternal rotation of the tibiaPosterior subluxation of the tibiaThe triple deformity is seen in RA, TB of knee and Polio(Refer: Mohindra's Fundamentals of Ohopedics, 2nd edition, pg no. 528)", 'role': 'assistant'}]