d
\([\text { Presure head }]=\frac{[\text { Pressure }]}{[\text { Density }] \times[ g ]}\)

Pressure \(=\frac{\text { F orce }}{\text { Area }}\)

But,Force \(=\) Mass \(\times\) Accelaration \(=[ M ]\left[ LT ^{-2}\right]=\left[ MLT ^{-2}\right]\)

Then,

\([\text { Pressure }]=\frac{\left[ MLT ^{-2}\right]}{\left[ L ^2\right]}=\left[ ML ^{-1} T ^{-2}\right]\)

[Density \(]=\frac{[ Mass ]}{[\text { V olume }]}=\frac{[ M ]}{\left[ L ^3\right]}= ML ^{-3}\)

Now,

\([\text { Presure head }]=\frac{[\text { Pressure }]}{[\text { Density }] \times[ g ]}=\frac{\left[ ML ^{-1} T ^{-2}\right]}{\left[ ML ^{-3}\right]\left[ LT ^{-2}\right]}=\left[ M ^0 L ^1 T ^0\right]\)