Consider the following characteristics:
1. The fluid enters the pump axially and is discharged radially
2. Maximum efficiency may be of the order of 90%
3. Development of a low head
4. A limited suction capacity
Which of the above characteristics are possessed by axial flow pumps
(a) 1 and 2 (b) 2 and 3 (c) 2 and 4 (d) 3 and 4