Definition: In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
Input: Question: What transport system do thyroid follicular cells use to capture iodide through its basal pole ?: 
 Options:  <1> A primary active transporter. <2> An iodide exchanger with chloride. <3> A transporter called pendrina. <4> A process of pinocytosis. <5> A sodium iodide carrier.
