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': "An adolescent child complains of night pain in the knee. It could be due to –a) Juvenile rheumatoid arthritisb) Idiopathic growth painc) Osteosarcomad) Paget's diseasee) Osteomyelitis \nSelect and explain. \nA. a, B. ac, C. ad, D. b", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Causes of knee pain in adolescence \n\nTime of the knee pain helps in the diagnosis of the disorders : -\n\nNight pain indicates\ni) Inflammatory disorder → Juvenile rheumatoid arthritis.\nii) Bursitis, sinusitis\niii) Tumour → Osteosarcoma\nPain at the end of the day and after activity indicates\ni)\xa0 Mechanical pain due to injury\nContinuous pain present day and night indicates\ni)\xa0Infection → Osteomyelitis, Septic arthritis\nii)\xa0Idiopathic adolescent anterior knee pain syndrome (Chondromalacia patella).', 'role': 'assistant'}]