This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pemphigoid Group, Subject name: Skin
[{'content': "Positive Nikolsky's sign is a feature of - \nSelect and explain. \nA. Pemphigoid, B. Dermatitis herpetiformis, C. Pemphigus, D. Rubella", 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans is 'c' i.e. pemphigus Positive Nikolskv's sign is seen ino Pemphiguso Epidermolysis bullosao Staphylococcal scalded skin syndromeo Bullous impetigoo Toxic epidermal necrolysiso Bullous lichen planuso Steven jonson syndromeo Mycosis fungoideso HSV&VZV infectiono Malignancy (leukemia)", 'role': 'assistant'}]