1 Bar of pressure is equal to

Pressure is defined as the normal force applied per unit area

$P=\frac{F}{A}$

SI unit of force in newton
SI unit of area is $m^2$

Therefore, SI unit of pressure is Newton per square meter(N/m²) OR Pascal.

A bar is also a unit of pressure which is defined as:
1 Bar = 100000Pa

$$\begin{gathered} 1 Pascal = 1\frac{N}{m^2} \\ bar=b \\ kilopascal = Kpa \\ i.e.1 bar = 100Kpa \end{gathered}$$

Therefore, option C is correct.