Which of the following methods is/are adopted to bring down the speed of an impulse turbine to practical limits?
1. Use of flywheels 2. Use of governor 3. Compounding 4. Increasing the load
Select the correct answer using the code given below
(a) 1 and 2 (b) 1, 2 and 3 (c) 3 only (d) 1, 2, 3 and 4