Which fluid is considered as an ideal fluid?

Which fluid is considered as an ideal fluid?

a. Compressible with no viscosity
b. Incompressible with no viscosity
c. Incompressible with high viscosity
d. Compressible with high viscosity

Correct Answer : b. Incompressible with no viscosity

Explanation :

Ideal fluid is considered as incompressible as there should not be any gap between two particles of fluid and having no viscosity. But ideal fluid is only an imaginary fluid. All existing fluids are having some viscosity.