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: In eukaryotes, group II introns are in genes: 
 Options:  <1> Of rRNA. <2> From tRNA. <3> They encode proteins in the nucleus. <4> They encode proteins in mitochondria. <5> None is correct.
Example Output: 4

Example Input: Question: Which amino acid serves as a starting point for the synthesis of porphyrins (heme group)? 
 Options:  <1> Valina <2> To the girl. <3> Asparagine <4> Lysine <5> Glycine
Example Output: 5

Example Input: Question: What percentage of the bicarbonate filtered in the glomerulus is reabsorbed under normal conditions along the nephron and in which segment is most of this reabsorption produced ?: 
 Options:  <1> It is reabsorbed almost 100%, mostly in the collector duct. <2> Approximately 50% is reabsorbed, mostly in the proximal convoluted tubule. <3> Approximately 50% is reabsorbed, mostly in the distal convoluted tubule. <4> Less than 20% is reabsorbed, mostly in the collecting duct. <5> It is almost 100% reabsorbed, mostly in the proximal convoluted tubule.
Example Output:
5