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: Pathology
In Hydrocephalus exvacuo, the compensatory enlargement of ventricles and increase in CSF volume due to brain atrophy is seen in- 
Select and explain. 
A. Alzheimers diseae, B. Picks diseases, C. Both, D. None of the above
C: Both
Answer: C: Both 
Explanation: Ans. is 'c' i.e., Both Hydrocephalus ex vacuo In significant coical atrophy, there is compensatory ventricular enlargement secondary to loss of parenchyma --> Hydrocephalus ex vacuo. o This can be seen in Alzheimer disease and Pick disease. -