This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Orthopaedics
[{'content': 'Which of the following statement is not true about Coxa Plana: \nSelect and explain. \nA. Occur more commonly in females, B. Commonly affect children in first decade, C. Abduction in flexion is restricted, D. Lateral subluxation of femoral head on x-rays', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. A. Occurs more commonly in females.* Coxa plana is pert he's disease. It is osteonecrosis of the proximal femoral epiphysis in a growing child caused by poorly understood factors. It affects male > females during first decade of life.* Most common symptom is limp. During early phase, joint is irritable so extremes of all the movements are restricted and painful.* Later, most movements are full but abduction, especially in flexion is almost always limited. When hip is flexed, it goes into ER.", 'role': 'assistant'}]