Definition: 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: Which of the following medications can cause renal failure in patients with bilateral renal artery stenosis by inhibiting the constrictor tone of the efferent arteriole ?:
Options: <0> Acetaminophen. <1> Diclofenac <2> Enalaprilo. <3> Metamizole <4> Furosemide.
Output:
pharmacology