Which of the following advantages is/are possessed by a Kaplan turbine over a Francis turbine?
1. Low frictional losses.
2. Part load efficiency is considerably high.
3. More compact and smaller in size.
Select the correct answer using the codes given below
a. Only 1 b. Only 1 and 2
c. Only 2 and 3 d. 1, 2 and 3