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: Unknown
[{'content': 'Lowest conc of Anaesthetic agent in pulmonary alveoli needed to produce immobility in response to painful stimulus in 50% individual is termed as: \nSelect and explain. \nA. Minimal alveolar concentration, B. Maximum alveolar concentration, C. Maximum analgesic concentration, D. Minimum analgesic concentration', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is \'a\' i.e. Minimal Alveolar concentration Minimal alveolar concentration (MAC)"is the lowest concentration of the anaesthetic in pulmonary alveoli needed to produce immobility in response to a painful stimulus in 50% individuals. It is accepted as a valid measure of potency of inhalational general anesthetics" - KDT', 'role': 'assistant'}]