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
Which of the following is true regarding Metronidazole in amoebiasis? 
Select and explain. 
A. Intestinal and extra-intestinal trophozoite killer, B. Intestinal cyst killer, C. Extraintestinal cyst killer, D. Intestinal trophozoite killer
A: Intestinal and extra-intestinal trophozoite killer
Answer: A: Intestinal and extra-intestinal trophozoite killer 
Explanation: Nitroimidazoles are intestinal and extraintestinal tissue amoebicides killing only trophozoites.Ref: Tripati 5th ed: Pg:750