Instructions: 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: On the thick ascending branch of the loop of Henle:
Options: <1> Water is reabsorbed. <2> The tubular liquid is diluted. <3> Water reabsorption depends on ADH. <4> The reabsorption of urea depends on ADH. <5> Aldosterone stimulates Na + reabsorption.
Output:
2