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
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: (Refer: Morgan and Mikhail’s Clinical Anaesthesiology, 5th edition, pg no. 160, 268, 510)

Minimum alveolar concentration (MAC) → Measure of potency
Blood: Gas partition coefficient →Blood solubility of anaesthetic agent and determines the speed of induction & recovery
Oil: Gas partition coefficient → Lipid solubility of anaesthetic agent and is related to potency of anaesthetic agent.