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
Orgnanic mental diorder in 24 year old man could feature of all of he following except? 
Select and explain. 
A. Impaired memory, B. Decreased consciousness, C. Vomiting, D. Normal intelligence
D: Normal intelligence
Answer: D: Normal intelligence 
Explanation: Impaired memory may be seen in chronic alcoholics with vitamin deficiency. Decreased consciousness and vomiting may be a feature of head injury and raised ICT. Organic mental disorder often involves some aspects of the intelligence being affected.