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: Dental
[{'content': 'A 40-year-old woman presented with 8-month history of erythema and swelling of the periorbital region & papules & plaques an the dorsolateral aspect of forearms & knuckles with ragged cuticles. There was no muscle weakness. The most likely diagnosis is – \nSelect and explain. \nA. SLE, B. Dermatomyositis, C. Systemic sclerosis, D. Mixed connective tissue disorder', 'role': 'user'}, {'content': "Answer: B \nExplanation: This woman has:-\n\n\nErythema and swelling to periorbital region → Heliotrope erythema.\nPapules and plaques on the dorsolateral aspect of knuckle & forearms → Gottron's papule.\n\n\nDiagnosis is Dermatomyositis.", 'role': 'assistant'}]