This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Antibiotics, Subject name: Pharmacology
[{'content': 'Which of the following is true regarding Metronidazole in amoebiasis? \nSelect and explain. \nA. Intestinal and extra-intestinal trophozoite killer, B. Intestinal cyst killer, C. Extraintestinal cyst killer, D. Intestinal trophozoite killer', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Nitroimidazoles are intestinal and extraintestinal tissue amoebicides killing only trophozoites.Ref: Tripati 5th ed: Pg:750', 'role': 'assistant'}]