Oxytocin is used during which of the following procedures?
a. bowel resection
b. total abdominal hysterectomy
c. total hip replacement
d. cesarean section

(D). cesarean section

Explanation:

Oxytocin is a peptide hormone, synthesized by hypothalamus and secreted by posterior pituitary. Oxytocin plays role in sexual reproduction, lactation, and induce contractions during child birth.

Oxytocin is naturally produced at the time of child birth, but natural oxytocin has a short half-life. Hence, oxytocin infusion is done during child birth or cesarean section as it maintains contraction of uterine wall during the surgery.

Thus, the correct answer is option (D).