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: Medicine
[{'content': 'Diagnostic test of extra intestinal invasive amoebiasis is - \nSelect and explain. \nA. Counter immuno-electrophoresis, B. Complement fixation test, C. ELISA, D. Indirect haemagglutination test', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]