<prompt> In Hydrocephalus exvacuo, the compensatory enlargement of ventricles and increase in CSF volume due to brain atrophy is seen in-Alzheimers diseaePicks diseasesBothNone of the above  <response>: 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. - 