Consider the following turbines/ wheels:
1. Francis turbine
2. Pelton wheel with two or more jets
3. Pelton wheel with a single jet
4. Kaplan turbine
The correct sequence of these turbines/ wheels in increasing order of their specific speeds is
a) 2,3,1,4 b) 3,2,1,4
c) 2,3,4,1 d) 3,2,4,1