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: The extraction technique that is used for gas chromatographic determinations in which the analyte is desorbed or thermally desorbed is called: 
 Options:  <1> Liquid-liquid extraction. <2> Extraction in solid phase. <3> Microextraction in solid phase. <4> Subextraction in solid phase. <5> Crystallization.
