<prompt> NOT true is:Superior thyroid aery is branch of external carotidParathyroid aery is a branch post division of superior thyroid aeryInferior thyroid aery is branch of thyrocervical trunkThyroid ima aery is invariaby a branch of arch of aoa  <response>: Parathyroid aeries are usually branches of inferior thyroid not superior thyroid aery Superior thyoid aery is a branch evternal carotid aery contributes paly towards the parathyroids blood supply Inferior thyroid aery is a branch of thyrocervical trunk is the main source of blood supply to the parathyroids. Thyroid ima aery is present in a small group of population has a variable origin may be a branch of arch of aoa, subclan aery, common carotid aery. 