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: Affinity chromatography is characterized because: 
 Options:  <1> It is a modality of gas chromatography. <2> It is similar to paper chromatography. <3> It is a separation process based on the very selective or specific interactions that exist between biological macromolecules. <4> It is a technique of separating compounds according to their molecular weight. <5> It is a variant of chromatography that employ relatively non-polar stationary phases and more polar solvents, in contrast to normal phase chromatography.
