​Which is the least frictional force of the following? ​

Correct option is D

The correct answer is (D) Rolling.

Explanation:Rolling friction is the least frictional force compared to sliding, fluid, and static friction.

Incorrect Options Explanations:

•  Sliding: Higher friction than rolling friction.
• Fluid: A different type of friction, not always the least.
• Static: Higher friction than rolling friction.

Information Booster:

• Rolling friction occurs when a wheel or spherical object rolls over a surface.
• It is usually much smaller than sliding friction, which occurs when an object slides over a surface.
• Examples: Rolling a ball, a car tire moving on the ground.