Answer:
Biofeedback.
Step-by-step explanation:
Different receptors present on the body that can detect the pain stimuli and initiates different response in the body. The different techniques that are used for the pain relief are biofeedback, yoga and cold.
Biofeedback technique of pain relieving uses the machine to monitor and regulate the psychologic response by using electrode sensor on the patient's body. The unit can be transformed the data into the visual form, displayed and can see the pain response. The physiologic response of the body is increased and pain can be controlled by breathing exercises and relaxation.
Thus, the correct answer is option (C).