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: Forensic Medicine
Delirium is a disorder of: UP 08 
Select and explain. 
A. Thought, B. Perception, C. Insight, D. Cognition
D: Cognition
Answer: D: Cognition 
Explanation: Ans. Cognition