Which one of the following is the graph of 
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Definitions:
Anesthesia
The use of drugs to prevent or reduce pain during surgery or other painful procedures.
Labor
The process of childbirth, beginning with contractions of the uterus and ending with the delivery of the baby.
Epidural
A medical procedure involving the injection of anesthesia into the epidural space of the spinal cord to provide pain relief, particularly during childbirth.
Spinal Canal
The cylindrical space within the spine that houses and protects the spinal cord.
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