This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Skin
[{'content': 'Pemphigus vulgaris is caused by: \nSelect and explain. \nA. Bacteris, B. Virus, C. Autoimmune, D. Fungal', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans: (c) AutoimmuneHarrison 19th ed. / 370# PEMPHIGUS* Pemphigus is an autoimmune blistering disorder* It results from the loss of integrity of normal intercellular attachments with the epidermis.* Commonly affects indiciduals of age between 40-60.* Equal prevalence among males and females.* There are five variants of pephigus:# Pemphigus Vulgaris: most common type# Pemphigus Foliaceous: superficial pemphigus# Pemphigus Vegetans: least common type# Pemphigus Erythematous# Fogo Selvagem: an endemic form of pemphigus foliacious.* Refer to above table', 'role': 'assistant'}]