This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous General Anesthesia, Subject name: Anaesthesia
[{'content': 'Index of potency of general anesthesia - \nSelect and explain. \nA. Minimum alveolar concentration, B. Diffusion coefficient, C. Dead space concentration, D. Alveolar blood concentration', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Minimum alveolar concentration Minimal alveolar concentrationo It is the lowest concentration of the anaesthetic in pulmonary alveoli needed to produce immobility in response to a painful stimulus (surgical incision) in 50% individuals,o It is the measure of potency of inhalation GAs.", 'role': 'assistant'}]