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: What type of amino acid side chains will compete with saline ions for solvation water ?: 
 Options:  <1> Apolares. <2> Aliphatic <3> Aromatic <4> Polar <5> Without charge.
