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': 'True about Rheumatic fever – \nSelect and explain. \nA. Chorea is aggravated during pregnancy, B. Chorea & arthritis co–existing, C. Subcutaneous nodules are tender, D. Erythema multiforme seen', 'role': 'user'}, {'content': "Answer: A \nExplanation: Sydneham's chorea \n\nThe characteristic picture of chorea is that it often occur in isolation, either unaccompanied by other major manifestations of RF or after a latent period of several months, at a time when all other manifestations of RF have subsided.\nRapid purposeless involuntary movements most noticeable in extremities and face.\nMovements disappear during sleep.\nEmotional liability is characteristic.\nMost patients recover in 6 months.\nSex hormones (estrogen) or pregnancy can cause recurrences.\n\nAbout option 'd'\nErythema marginatum (not erythema multiforme) is seen in RF.\nErythema marginatum \n\nRash present on the trunk and proximal parts of the extremities.\nFace is spared.\nMacules or papules that extend outwards while the skin in centre returns to normal.\nNever pruritic, never indurated.\nRash is evanescent migrating from place to place.\nNo residual scarring.", 'role': 'assistant'}]