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': 'If the 3rd supralabial scales are large and touching the eye and nasal shield, the snake may be \nSelect and explain. \nA. Krait, B. Pit viper, C. Saw scaled viper, D. Cobra', 'role': 'user'}, {'content': 'Answer: D \nExplanation: If the head scales are large, it may be poisonous or non poisonous. Look for the 3rd supra labial and if it is touching the eye and the nasal shield, it is poisonous (cobra or coral snake) Ref: FORENSIC MEDICINE AND TOXICOLOGY Dr PC IGNATIUS THIRD EDITION PAGE 511', 'role': 'assistant'}]