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: Medicine
[{'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: D i.e. Microarray DNA Microarrays (DNA-Chips) is used for detection or screening of variations in DNA sequences and gene expressionQ analysizing thousands of gene at a same time.', 'role': 'assistant'}]