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
When providing general anaesthesia during pregnancy, minimum alveolar concentration (MAC) is 
Select and explain. 
A. Increased, B. Decreased, C. Unchanged, D. Variable
B: Decreased
Answer: B: Decreased 
Explanation: MAC progressively decreased during pregnancy.