The Newton first law of motion is also known as:

Newton's first law of motion: Also known as the law of inertia. The ability of a body to resist change is referred to as inertia. Unless acted upon by an external force, an object will remain at rest or in uniform motion in a straight line, according to Newton's first law of motion.

The inertia of rest: When a body is at rest, it will stay at rest until an external force is applied to move it. This is known as inertia of rest.

The inertia of motion: When a body is moving uniformly, it will continue to move until an external force is applied to stop it. This is known as inertia of motion.

The law of inertia is another name for Newton's first law of motion. As a result, option 3 is correct.