This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Poisoning, Subject name: Anatomy
[{'content': "Polyvalent anti-snake venom is useful against all snakes except \nSelect and explain. \nA. Russel's viper, B. Common krait, C. Saw scaled viper, D. King cobra", 'role': 'user'}, {'content': "Answer: D \nExplanation: Polyvalent anti-snake venom It is given to neutralize the venom. The anti snake venom is prepared by hyperimmunising horses against four common poisonous snakes: cobra, common krait, Russell's viper, Saw scaled viper. The polyvalent anti-snake venom is not effective against bites by Banded krait, king cobra, pit vipers and sea snakes. ref: FORENSIC MEDICINE AND TOXICOLOGY Dr PC IGNATIUS THIRD EDITION PAGE 520", 'role': 'assistant'}]