This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'Which of following techniques is used for detection of variations in DNA sequence and Gene expression? \nSelect and explain. \nA. Nohern Blot, B. Southern Blot, C. Western Blot, D. Microarray', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Microarray is the technique used for detection of variation in DNA sequence and gene expression. Ref: DNA Technology By Joseph R. Lakowicz, Page 214.', 'role': 'assistant'}]