Consider the following statements: Steam turbines are suitable for use as prime movers for large steam power plants because 1. A single steam turbine can be designed for a capacity of 1000 MW or more 2. Much higher speed may he possible as compared to a reciprocating engine 3. They are more compact when compared to a gas turbine power plant 4. The maintenance cost and running cost may not increase with years of service. Which of these statements are correct?

• A. 1, 2 and 3                     
• B. 2, 3 and 4
• C. 1, 2 and 4                     
• D. 1, 3 and 4