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
Intense nihilism, somatization and agitation in old age are the hallmark symptoms of 
Select and explain. 
A. Involutional melancholia, B. Atypical depression, C. Somatized depression, D. Depressive stupor
A: Involutional melancholia
Answer: A: Involutional melancholia 
Explanation: Involutional Melancholia Described by Kraepelin, this is a form of severe depression which occurs in the involutional period of life (i.e. 40-65 years of age). It is typically characterised by marked agitation, the presence of psychotic features (such as delusions of persecution, tactile and auditory hallucinations) and multiple somatic symptoms (or hypochondriacal delusions). Ref: A Sho Textbook of Psychiatry, Niraj Ahuja, 7th Edition, pg. no.80