Consider the following statements:
For a velocity-compounded impulse steam turbine stage having two rows of moving blades
1. The work done in each row of moving blades is equal
2. The efficiency of a velocity-compounded stage is less than that of a pressure-compounded stage
3. The velocity-compounded stage is often used in the first stage of a multistage impulse turbine.
Which of the above statements is/are correct?
(a) 1 and 3 only (b) 2 only
(c) 2 and 3 only (d) 1, 2 and 3