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: Radiology
Which of these is not a pa of catatonia? 
Select and explain. 
A. Akathisia, B. Ambivalence, C. Ambitendency, D. Akinesia
A: Akathisia
Answer: A: Akathisia 
Explanation: Ans: A. Akathisia(Ref Kaplan and Sadock 11/e p329, 871; Niraj Ahuja 7/e p59).Akathisia:Not a pa of catatonia.Characterized by a subjective & objective sense of restlessness, anxiety & agitation.Ambitendency:Example of negativism.Considered an ambivalence form.Ambivalence:Sign of Schizophrenia.