This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anaesthesia
[{'content': "Characteristic of an ideal gas is \nSelect and explain. \nA. Volume is directly propoional to change in pressure, B. Volume is inversely propoional to change in temperature, C. At absolute temp. volume of gas is 1, D. Obeys Carles, Byles and Avagadro' laws", 'role': 'user'}, {'content': "Answer: D \nExplanation: D i.e. Obeys Charles, boyle's & avogadro's laws", 'role': 'assistant'}]