This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Protozoa, Subject name: Microbiology
[{'content': 'Most common cause of dysentery in adults is? \nSelect and explain. \nA. Crypto parvum, B. Giardia, C. Strongoloides, D. Entamoeba histolytica', 'role': 'user'}, {'content': "Answer: D \nExplanation: ANSWER: (D) EntamoebaREF: VariousThis was a difficult one and quite a nagging question, because no book gives a perfect answer.However after consulting various websites. CMDT, Harrison I reached the conclusion that most common cause of dysentery is bacterial > parasitic.Robbin's states that shighella is the prominent cause of dysentery in countries with poor hygiene, like India etc, while amongst parasites, it states that entameoba histolytica is major cause of dysentery.", 'role': 'assistant'}]