<prompt> Which among the following statement is not true?Superior thyroid aery is a branch of ext. carotid aPosterior branch of superior thyroid aery supplies parathyroid glandInferior thyroid aery is branch of thyrocervical trunkThyroid ima aery is invariably a branch of arch of aoa  <response>: The thyroid ima aery is infrequent 10 and variable in its orgin. It arises from the brachiocephalic aery, aoic arch, right common carotid aery, internal thoracic aery, or subclan aery. 