The pressure head in the pipeline is

Question

To measure the pressure head of the fluid of specific gravity S flowing through a pipeline, a simple micro-manometer containing a fluid of specific gravity S₁ is connected to it. The readings are as indicated in the diagram shown in below

The pressure head in the pipeline is

a. h₁S₁ – hS –$\Delta$h(S₁ – S)

b. h₁S₁ – hS₁ + $\Delta$h(S₁ – S)

c. hS – h₁S₁ – $\Delta$h(S₁ – S)

d. hS – h₁S₁ +$\Delta$h (S₁ – S)