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': 'All of the following factors decrease the minimum alveolar concentration (MAC) of an inhalation anaesthetic agent except – \nSelect and explain. \nA. Hypothermia, B. Hyponatremia, C. Hypocalcemia, D. Anemia', 'role': 'user'}, {'content': "Answer: C \nExplanation: Hypercalcemia (not hypocalcemia) decreases MAC.\n\nFactor's decreasing MAC :- Old age, acute alcohol intake, hypothermia, hyperthermia, hypercalcemia, hyponatermia,\nhypermagnesemia, Hypoxia, Hypercarbia, Anemia, Pregnancy, drugs.\nFactors increasing MAC :-Young age, chronic alcohol intake, hypematremia, Drugs.", 'role': 'assistant'}]