This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mood Disorders, Subject name: Psychiatry
An elderly gentleman develops severe depression. This condition is called: 
Select and explain. 
A. Involutional melancholia, B. Late onset melancholia, C. Pseudo-dementia, D. Atypical depression
A: Involutional melancholia
Answer: A: Involutional melancholia 
Explanation: Involutional melancholia was described by Emil Kraepelin. It is characterized by severe and agitated depression in elderly individuals. It can be associated with secondary delusions, hallucinations and other psychotic experiences. It is quite common to see hypochondriacal ideas/delusions in these individuals. Atypical depression has carbohydrate craving rather than avoidance