Answer:
a) A contributing factor in dysmenorrhea is the increased secretion of prostaglandins
Explanation:
Increased secretion of prostaglandins is a contributing factor in dysmenorrhea as in the primary dysmenorrhea, there is increased prostaglandin production by the endometrium in an ovulatory cycle which cause contraction of uterus thus resulting in pain.
All the other options are wrong, hence option a) A contributing factor in dysmenorrhea is the increased secretion of prostaglandins is the right option.