This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Pharmacology), Subject name: Pharmacology
In which type of poisonings is gastric lavage contraindicated? 
Select and explain. 
A. Organophosphorus poisoning, B. Sedative drug poisoning, C. Corrosive acid poisoning, D. Barium carbonate poisoning
C: Corrosive acid poisoning
Answer: C: Corrosive acid poisoning 
Explanation: Ans. C. Corrosive acid poisoningGastric Lavage is contraindicated when patients havea. Corrosive substance poisoningb. Convulsion (strychnine, tetanus)c. Comad. Volatile poisons (kerosene)e. Hypothermiaf. patients at risk of gastrointestinal hemorrhage or perforation.g. aluminum phosphide poisoning