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: Pediatrics
[{'content': 'A ten-year old girl presents with swelling of one knee joint. All of the following conditions can be considered in the differential diagnosis except - \nSelect and explain. \nA. Tuberculosis, B. Juvenile rheumatoid ahritis, C. Haemophilia, D. Villonodular synovitis', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Haemophilia Although all conditions mentioned in the options may produce swelling of one knee joint, the clue lies in the fact that haemophilia is an X Linked recessive disease and is not manifested in girls who act only as carriers.", 'role': 'assistant'}]