Unable to answer a question about Newton's law of motion, a student tries to pull himself up by tugging on his hair. He will not be successful:

Newton's First Law stated that unless acted upon by an external force, a body will remain in its state of rest or uniform motion along a straight line.

If no net force acts on a body, its velocity cannot change, implying that the body cannot accelerate.

Newton's first law states that the state of a body can only be changed if an external force is applied to it.

A student was unable to succeed because he was using internal force to pull himself up by tugging on his hair. As a result, option 4 is correct.