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
Mutism and akinesis in a person who appears awake and even ale is best described as 
Select and explain. 
A. Twilight state, B. Oneroid state, C. Stupor, D. Delirium
C: Stupor
Answer: C: Stupor 
Explanation: Stupor: Akinesis (no movement) with mutism but with evidence of relative preservation of conscious awareness. the most impoant psychiatric disorders in which the patient presents with stupour is catatonia which is a type of schizophrenia and dissosiative stuour which is a type of neurotic illness. catatonic stupour has a good response with electro convulsive therapy and lorazepam dissosiative stupour has a good response with psychotherapy and narcoanalysis and working on the stressors in patients life. Ref: A Sho Textbook of Psychiatry, Niraj Ahuja, 7th Edition, pg. no.59 synopsis of psychiatry, kaplan and sadock, 11th Edition, pg. no.309