Correct Answer - Option 3 : Both viscosity and surface tension
Explanation:
Ideal fluid
Fluids which don’t have viscosity and are incompressible are termed as an ideal fluid such fluid do not offer shear resistance i.e no resistance is encountered as the fluid moves.
These fluids are hypothetical fluids that is they do not exist in reality.
The fluid posses following properties
- Non-viscous
- Incompressible
- Irrotational
Real fluid
Fluids which do possess viscosity are termed as real fluids. These fluids always offer shear resistance i.e. Certain amount of resistance is always offered by these fluids as they move.
All the fluids that exist in reality are real fluids.
