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: To detect small deletions or duplications at the genomic level, the technique of choice would be: 
 Options:  <1> Karyotype of bands G. <2> Genomic microarrays. <3> Expression microarrays. <4> PCR <5> RT-PCR.
