This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
[{'content': 'In catatonic schizophrenia which is not found - \nSelect and explain. \nA. Waxy flexibility, B. Automatic obedience, C. Somatic passivity, D. Gegenhalten', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Features of catatonic schizophrenia may be:-\n\n\nExcited catatonia:- It is characterized by increased in psychomotor activity, i.e. restlessness, agitation, excitement, aggressiveness, violence. The impulsive activity occurs in response to hallucination and delusions.\nStuporous (retarded catatonia):- It is characterized by extreme retardation of psychomotor activity. It includes mutism, rigidity, negativism, posturing, stupor, echolalia, echopraxia, catalepsy (waxy flexibility), ambitendency, gegenhalten, stereotypies, stupor, mannerism, Grimacing, automatic obedience.\n\n\nOption \'c\' & \'d\' requires specific mention here :-\n\n"Gegenhalten (paratonia) is the classical sign of Pronto parietal disease. It is frequently associated with catatonic\xa0schizophrenia".\n\nGegenhalten is an involuntary resistance to passive movement due to hypertonia.\nSomatic passivity :- Bodily sensations, especially sensory symptoms, are experienced as imposed on body by some external force. It is particularly seen in hebephrenic (disorganized) schizophrenia.', 'role': 'assistant'}]