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'.

Example Input: Question: Liquid chromatography in normal phase: 
 Options:  <1> It uses a column with apolar groups that interact with the apolar part of the analytes differentially. <2> It is a mode of operation that employs a polar stationary phase with a low polarity mobile phase. <3> It uses highly polar mobile phases such as alkanes or chloroalkanes. <4> It is a mode of operation that employs a non-polar surface with a mixed aqueous / organic mobile phase. <5> It uses stationary phases with a large number of hydrophobic alkyl ligands.
Example Output: 2

Example Input: Question: The lithium aluminum hydride is a nucleophile strong enough to be added to the carbonyl group of the carboxylate ions. This process allows obtaining: 
 Options:  <1> Primary alcohols. <2> Secondary alcohols <3> Tertiary alcohols. <4> Ketones <5> Ethers
Example Output: 1

Example Input: Question: Each cycle of oxidation of fatty acids: 
 Options:  <1> Consume two molecules of NADH. <2> It generates two molecules of FADH2. <3> It produces a dehydration. <4> Releases an acetyl-CoA. <5> Consume ATP.
Example Output:
4