This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
[{'content': 'Agranular endoplasmic reticulum is involved in the synthesis of \nSelect and explain. \nA. Protien, B. Lipid, C. Carbohydrate, D. Vitamin D', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Agranular Endoplasmic reticulum is also called smooth Endoplasmic reticulum. It is the site of steroid synthesis and detoxification. Granular is involved in protein synthesis.(REF: Ganong&;s Review of medical physiology)', 'role': 'assistant'}]