The critical pressure ratio (p2/p1) is given by

• A. <img src="/_files/images/mechanical-engineering/steam-nozzles-and-turbines/313-26-1.png">
• B. <img src="/_files/images/mechanical-engineering/steam-nozzles-and-turbines/313-26-2.png">
• C. <img src="/_files/images/mechanical-engineering/steam-nozzles-and-turbines/313-26-3.png">
• D. <img src="/_files/images/mechanical-engineering/steam-nozzles-and-turbines/313-26-4.png">