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: Skin
[{'content': 'What is the treatment for nodulocystic acne vulgaris? \nSelect and explain. \nA. Isotretiroin, B. Clindamycine cream, C. Topical steroids, D. Benzoyl peroxide', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Nodulocystic acne is a severe form of acne which is very disfiguring. Nodulocystic acne sufferers develop nodules as well as cysts. Extensive scaring may result from this condition. Oral or systemic Isotretinoin is used in treatment. Oral antibiotics and contraceptives are also used.', 'role': 'assistant'}]