<prompt> Which antithyroid medication is used in pregnancy?MethimazoleCarbimazolePropylthiouracilAll of the above  <response>: Ans. is c i.e., Propylthiouracil o Both carbimazole and propylthiourcil can be used during pregnancy, but propyl-thiouracil is the drug of choice because its greater protein binding allows low doses of propylthioracil to be transferred across the placenta and therefore less chance of hypothyroidism. 