This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Toxicology - 2, Subject name: Forensic Medicine
[{'content': 'In sulfuric acid poisoning all the following are seen, except \nSelect and explain. \nA. Dryness of mouth, B. Damaged tongue, C. Chalky white teeth, D. Swollen tongue with white coating', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Sulphuric acid poisoning: Colourless, odourless, non-fuming Signs & symptoms * Brown to black streak from angle of mouth* Black tongue* Chalky white teeth* Black necrotic stomach or black charred stomach* Blotting paper stomach * Gastric perforation The mind remains clear till death. Fatal dose : 5-10ml Fatal period : 12-24 hour Sulphuric acid is the most common substance associated with vitriolage.', 'role': 'assistant'}]