Instructions: In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.
Input: Question: The sequencing of an oligosaccharide is done by: 
 Options:  <0> Degradation Edman. <1> Chromatography Whatman. <2> Patch-Clamp. <3> Mass spectrometry. <4> Capillary electrophoresis.
Output:
pharmacology