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: Physiology
Which of the following techniques is used for detection of variations in DNA sequence and Gene expression 
Select and explain. 
A. Hypothalamus, B. Thalamus, C. Putamen, D. Limbic coex.
A: Hypothalamus
Answer: A: Hypothalamus 
Explanation: A i.e. Hypothalamus