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
Scholastic performance is impaired in all of the following, except : 
Select and explain. 
A. Attention Deficit Hyperactivity Disorder (ADHD), B. Specific Learning Disability (SLD), C. Anxiety, D. PICA
D: PICA
Answer: D: PICA 
Explanation: Pica is a psychological disorder characterized by an appetite for substances that are largely non - nutritive, such as ice (pagophagia) ; hair (trichophagia) ; paper (xylophagia) ; drywall or paint ; metal (metallophagia) ; stones (lithophagia) or soil (geophagia) ; glass (hyalophagia) ; faeces (coprophagia) ; and chalk.