This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Concepts, Subject name: Pathology
[{'content': 'The commonest location for the carcinoid tumor is which of the following? \nSelect and explain. \nA. Small intestine, B. Bronchus, C. Appendix, D. Stomach', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Carcinoid tumor:- Neuroendocrine tumor, most common site being GIT and Lungs being 2nd most common In GIT, most common site is small intestine Composed of cells that contains dense-core neurosecretory granules in their cytoplasm.', 'role': 'assistant'}]