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: Pathology
[{'content': 'The ultrastructural finding seen in case of paraganglioma is: \nSelect and explain. \nA. Deposition of glycogen, B. Enlarged mitochondria, C. Shrunken mitochondria, D. Dense core granules', 'role': 'user'}, {'content': 'Answer: D \nExplanation: . Dense core granules', 'role': 'assistant'}]