This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
The microarray is used to 
Select and explain. 
A. Study multiple genes, B. Study disease, C. Study organism, D. Study blood group
A: Study multiple genes
Answer: A: Study multiple genes 
Explanation: Microarray - A type of hybridization technique which utilizes multiple oligonucleotide probes to study multiple genes within a sho period of time.(Ref: Robbins 8/e p174)