The maximum efficiency of a reaction turbine is

• A. <img src="/_files/images/mechanical-engineering/steam-nozzles-and-turbines/321-111-1.png">
• B. <img src="/_files/images/mechanical-engineering/steam-nozzles-and-turbines/321-111-2.png">
• C. <img src="/_files/images/mechanical-engineering/steam-nozzles-and-turbines/321-111-3.png">
• D. <img src="/_files/images/mechanical-engineering/steam-nozzles-and-turbines/321-111-4.png">