This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Anatomy
[{'content': 'Which is true of ivermectin \nSelect and explain. \nA. It is the most effective drug for strongyloidiasis, B. It is drug of choice for onchocerciasis, C. It can be used to treat scabies, D. All the above a', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ref-KDT 6/e p813,814 Ivermectin is the drug of choice for onchocerciasis (river blindness) and strongyloidosis. It is also effective against other filarial worms It can also be used orally for the treatment of scabies and pediculosis. DEC is contraindicated in onchocerciasis', 'role': 'assistant'}]