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: Psychiatry
Wernicke's encephalopathy involves which pa of CNS : 
Select and explain. 
A. Mammillary body, B. Thalamus, C. Frontal lobe, D. Arcuate fasciculus
A: Mammillary body
Answer: A: Mammillary body 
Explanation: A i.e. Mammilary body