Without reducing the fluid flow rate, the speed of an impulse steam turbine can be brought down to practical limits by which of the following methods?
(1) Large flywheel
(2) Centrifugal governor
(3) Velocity compounding
(4) Steam bleeding
(a) 1, 2 and 3 (b) 2,3 and 4
(c) 2 only (d) 3 only