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: Unknown
[{'content': 'Adult worm of Echinococcus is found in: \nSelect and explain. \nA. Dog, B. Humans, C. Domestic animals, D. Felines', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ref. Textbook of Microbiology and Immunology BY Parija. – Compiled from Various chapters', 'role': 'assistant'}]