This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Forensic Medicine
[{'content': 'Gastric lavage is contraindicated in? \nSelect and explain. \nA. Organo-Phosphosphate poisoning, B. Hydrocarbons, C. Bicarbonate, D. PCM toxicity', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Contraindications of gastric lavage: Absolute: Corrosives to prevent fuher damage from perforation (except carbolic acid - causes leathery mucosa of stomach - no risk of perforation). Relative: 1. Convulsant - may induce more convulsions 2. Comatose - |change of aspiration.3. Varices - can cause bleeding 4. Volatile - hydrocarbons / kerosene: risk of aspiration reading to chemical pneumonitis.', 'role': 'assistant'}]