Question

A hydraulic power station has the following major items in the hydraulic circuit:         

1. Draft tube   2. Runner

3. Guide wheel            4. Penstock

The correct sequence of these items in the direction of flow is

(a) 4,2,3,1                    (b) 4,3,2,1

(c)1,2,3,4                     (d)1,3,2,4