Correct option is (a) A type of anesthesia used during childbirth
To explain: Epidural is when anesthesia is administered in the epidural space of the spinal chord. During a normal childbirth, it is used as a relaxant and dilator. During cesarian, an increased dose is used as anesthesia. Epidural is commonly known for childbirth but is used in many other cases. Sometimes, a catheter is used to continuously administer the drug to prolong the numbing sensation.