This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetics, Subject name: Pathology
[{'content': 'Microarray is - \nSelect and explain. \nA. Study of multiple genes, B. Study of disease, C. Study of organisms, D. Study of blood group', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e.. Study of multiple genes o Microarray is a hybridization of a nucleic acid sample to a very large set of oligonucleotide probes, which are attached to a solid support, to determine sequence or to detect variations in a gene sequence or expression or for gene mapping.o It has two major applications: gene expression analysis'and genetic variation analysis.", 'role': 'assistant'}]