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
Which of the following symptom is not one among the 4 'A's of Bleuler? 
Select and explain. 
A. Ambivalency, B. Auditory Hallucination, C. Autism, D. Affective Flattening
B: Auditory Hallucination
Answer: B: Auditory Hallucination 
Explanation: Auditory Hallucination is Pathognomic of Schizophrenia, but not one among the 4 'A's given by Eugene Bleuler.
Gave 4'A's of Schizophrenia

Autistic behaviour: is characterized by irrational thinking and withdrawn behaviour.
Ambivalence: Inability to take decision
Association loss or Derailment: There is loss of connection between individual throught process the speech of patient is disorganized.
Affect Disturbance / Affective Flattening: Emotional disturbances.