Detailed 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.
Q: Question: Urine is hypoosmolar with respect to plasma in:
Options: <0> Bowman's capsule. <1> Proximal tubule <2> Medulla area of the loop of Henle. <3> Initial zone of the distal tubule. <4> Collecting tubule in the presence of ADH.
A:
biology