This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hepatobiliary System, Subject name: Anatomy
[{'content': 'Gerlach valve is present in - \nSelect and explain. \nA. Gall bladder, B. Nasolacrimal duct, C. Pancreatic duct, D. Vermiform appendix', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Vermiform appendix o Gerlach's valve (valvula processus vermiformis) is a fold of mucous membrane found at opening of vermiform appendix of some people.", 'role': 'assistant'}]