This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Toxicology - 3, Subject name: Forensic Medicine
[{'content': 'Sudomotor neuropathy in poisoning:- \nSelect and explain. \nA. Arsenic, B. Mercury, C. Lead, D. copper', 'role': 'user'}, {'content': "Answer: A \nExplanation: Mnemonic Arsenic poisoning A - Anemia / Aldrich Mee's line / Arsenophagist (Tolerate upto 300mg ) R - Rain drop pigmentation / Reinsch test / Red velvety mucosa S - Sub endocardial hemorrhages / Sensory neuropathy E - Eruptions N - NAA I - Imbibition of arsenic ( Arsenic imbibed from surrounding soils after death ) / before treated iron oxide C - Cumulative poison / Cholera like symptom / Chelation for treatment", 'role': 'assistant'}]