This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: parasitology, Subject name: Microbiology
[{'content': 'Visceral leishmaniasis - \nSelect and explain. \nA. Caused by L.tropica, B. Post-leishmaniasis dermatitis is common, C. Antimonials are useful drugs, D. Diagnosed by blood smear', 'role': 'user'}, {'content': 'Answer: C \nExplanation: sodium stiboglucnate given intravenously It is a pentavalent antimonial compound Antimony resistance has become a serious problem ( refer pgno: 42 baveja 3 rd edition )', 'role': 'assistant'}]