Frederick Sanger sequenced insulin, the first protein to have its amino acid sequence determined. This achievement was pivotal in the study of proteins and molecular biology.
In the given pentapeptide, find out an essential amino acid (\(Y\)) and the sequence present in the pentapeptide. 
Choose the correct answer from the options given below:
Given below are two statements for the following reaction sequence: 
Match List-I with List-II. 