This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Symptoms and signs in psychiatry and classification, Subject name: Psychiatry
Catatonic features seen in schizophrenia are also seen in 
Select and explain. 
A. Severe depression, B. Conversion disorder, C. Personality disorder, D. Somatisation disorder
A: Severe depression
Answer: A: Severe depression 
Explanation: Catatonia can be present in several mental disorders, most commonly seen in schizophrenia and mood disorders. The hallmark symptoms of catatonia--mutism, stuporousness, blunted affect, extreme withdrawal, negativism, and marked psychomotor retardation there are various causes for catatonia namely both catatonic and non catatonic schizophrenia, major depressive disorder (often with psychotic features medical and neurological disorders like akinetic mutism seen in frontal lobe syndromes, locked in syndrome Reference: Kaplan & Sadock's synopsis of psychiatry, 11th edition, page 360.