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': 'In sebaceous glands, accumulation of sebum leads to: \nSelect and explain. \nA. Milia, B. Acne, C. Epidermoid cyst, D. Miliaria', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. b. Acne4 steps in pathogenesis of Acne are:Sebum productionHyperkeratosis of pilosebaceous unitPropionibacterium acnes colonization of pilosebaceous unit Inflammation', 'role': 'assistant'}]