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: 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:  <1> Acetaminophen. <2> Diclofenac <3> Enalaprilo. <4> Metamizole <5> Furosemide.
