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
Minimum alveolar concentration (MAC) is a measure of - 
Select and explain. 
A. Potency of anaesthetic agent, B. Speed of induction and recovery, C. Lipid solubility of agent, D. Toxicity of agent
A: Potency of anaesthetic agent
Answer: A: Potency of anaesthetic agent 
Explanation: Ans. is 'a' i.e., Potency of anaesthetic agent o Minimum alveolar concentration (MAC) - Measure of potency.o Blood : Gas partition coefficient - Blood solubility of anaesthetic agent and determines the speed of induction & recovery.o Oil: Gas partition coefficient - Lipid solubility of anaesthetic agent and is related to potency of anaesthetic agent.