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
All of the following factors decrease the minimum alveolar concentration (MAC) of an inhalation anaesthetic agent except – 
Select and explain. 
A. Hypothermia, B. Hyponatremia, C. Hypocalcemia, D. Anemia
C: Hypocalcemia
Answer: C: Hypocalcemia 
Explanation: Hypercalcemia (not hypocalcemia) decreases MAC.

Factor's decreasing MAC :- Old age, acute alcohol intake, hypothermia, hyperthermia, hypercalcemia, hyponatermia,
hypermagnesemia, Hypoxia, Hypercarbia, Anemia, Pregnancy, drugs.
Factors increasing MAC :-Young age, chronic alcohol intake, hypematremia, Drugs.