What is one primary difference between an upper motor neuron and a lower motor neuron?/2022

What is one primary difference between an upper motor neuron and a lower motor neuron?

1. AN UPPER MOTOR NEURON EXITS THE SPINAL CORD
2. ALL UPPER MOTOR NEURONS ARE CLOSER TO THE BRAIN
3. AN UPPER MOTOR NEURON IS COVERED IN MYELIN
4. AN UPPER MOTOR NEURON DOES NOT EXIT THE SPINAL CORD