Respuesta :
A TENS unit is Used to treat Chronic Pain.
Option A
Explanation:
Transcutaneous electric nerve stimulation it is a electronic device which tends to send the current waves to the affected body parts so that with the help of electrical therapy the chronic pain can be easily dealt with.
It is generally a bigger unit used in the administrative offices like hospitals or a nursing home but you can safely use them at home for better results. The electric current is mild in nature so can be used easily and there is no harm involved.