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: Medicine
[{'content': 'Which type of carcinoid is associated with greatest incidence of metastasis ? \nSelect and explain. \nA. Appendix carcinoid, B. Colonic carcinoid, C. Hepatic carcinoid, D. Pancreatic carcinoid', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Incidence of metastasis in different types of carcinoid are : Pancreatic Carcinoid : 71.9 %, Liver 32%, Appendix Carcinoid : 38.8 and Colonic Carcinoid is : 51. Reference: Harrisons Principles of Internal Medicine, 18th Edition, Page 3058, Table 350-3', 'role': 'assistant'}]