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
Which one of the following diseases is a communicable? 
Select and explain. 
A. rickets, B. amoebiasis, C. diabetes, D. cancer
B: amoebiasis
Answer: B: amoebiasis 
Explanation: Amoebiasis, also known amoebic dysentery, is an infection caused by any of the amoebae of the Entamoeba group.
Symptoms are most common during infection by Entamoeba histolytica. 
Amoebiasis can be present with no, mild, or severe symptoms. Symptoms may include abdominal pain, diarrhea, or bloody diarrhea.