This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anaesthetic equipments, Subject name: Anaesthesia
[{'content': 'For high pressure Storage of compressed gases cylinders are made up of \nSelect and explain. \nA. Molybdenum steel, B. Iron + Mo, C. Steel + Cu, D. Cast iron', 'role': 'user'}, {'content': 'Answer: A \nExplanation: To withstand high pressure cylinders are made up of molybdenum and steel.', 'role': 'assistant'}]