Instructions: In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.
Input: Question: What transport system do thyroid follicular cells use to capture iodide through its basal pole ?:
Options: <0> A primary active transporter. <1> An iodide exchanger with chloride. <2> A transporter called pendrina. <3> A process of pinocytosis. <4> A sodium iodide carrier.
Output:
pharmacology