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: Social & Preventive Medicine
[{'content': 'Which one of the following diseases is a communicable? \nSelect and explain. \nA. rickets, B. amoebiasis, C. diabetes, D. cancer', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Amoebiasis, also known amoebic dysentery, is an infection caused by any of the amoebae of the Entamoeba group.\nSymptoms are most common during infection by Entamoeba histolytica.\xa0\nAmoebiasis\xa0can be present with no, mild, or severe symptoms. Symptoms may include abdominal pain, diarrhea, or bloody diarrhea.', 'role': 'assistant'}]