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: Pharmacology
[{'content': 'Chloroquine acts on - \nSelect and explain. \nA. Merozoites, B. Blood schizont, C. Tissue schiont, D. Gametocytes', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Blood schizont o Chloroquine is highly effective blood schizontocide.", 'role': 'assistant'}]