Answer: Option (a) is the correct answer.
Step-by-step explanation:
Viscosity is defined as the inability of a liquid to flow easily. Basically, a liquid which is very thick will have the highest viscosity.
Molecules of some liquids are more closely packed due to which they face resistance in movement from one place to another.
On the other hand, when we heat a liquid then molecules gain kinetic energy. As a result, they tend to move away from each other. This movement of molecules make the flow of liquid easy and it will have the lowest viscosity.
Thus, we can conclude that out of the following hot oil is likely to have the lowest viscosity.