This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Organic Mental Disorder, Subject name: Psychiatry
Delusion is a disorder of: 
Select and explain. 
A. Thinking, B. Memory, C. Perception, D. Intellect
A: Thinking
Answer: A: Thinking 
Explanation: Ans. is 'a' Thinking Cognition (Thought) Disorders are -Schizophrenia*Obsessive compulsive neurosis*Delusions* & phobias*Also rememberHallucinations are disorder of - perception*