Which level of prolactin definitely suggest prolactinoma?

Which level of prolactin definitely suggest
prolactinoma?
a) 300 ng/ml
b) 150 ng/ml
c) 200 ng/ml
d) 100 ng/ml
Correct Answer - C
Answer: C - 200 ng/ml
Prolactinomas are the most common type of hyperfunctioning
pituitary adenoma.
Benign tumors of pituitary gland producing prolactin.
Hyperprolactinemia causes amenorrhea, galactorrhea, loss of libido,
and infertility.
Because many manifestations of hyperprolactinemia (e.g.,
amenorrhea) are more obvious in premenopausal women than in
men or postmenopausal women, prolactinomas usually are
diagnosed at an earlier stage in women of reproductive age than in
other persons so affected.
Higher blood prolactin concentrations are seen.
mild elevations of serum prolactin (less than 200 μg/L) in a patient
with a pituitary adenoma do not necessarily indicate a prolactin-
secreting neoplasm.