Which statement best describes the mechanism of action of the antithyroid drug propylthiouracil (PTU) propacil)?
a. Propylthiouracil inhibits incorporation of iodine molecules into the amino acid tyrosine which leads to reduced levels of both T3 and T4.
b. Propylthiouracil promotes uptake of underline molecules into the amino acid tyrosine to produce the thyroid hormones T3 and T4.
c. Propylthiouracil is a deactivation synthetic form of thyroid hormone.
d. propylthiouracil Promote the conversion of T4 and T3 in the peripheral circulation.