This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'The following has rough appearance: \nSelect and explain. \nA. Rough endoplasmic reticulum, B. Agranular endoplasmic reticulum, C. Golgi apparatus, D. All', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Rough endoplasmic reticulum has granules on the surface hence appear rough The granules mainly contain ribosomes and involved in protein synthesis', 'role': 'assistant'}]