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
A 14 year old boy has difficulty expressing himself in writing and makes frequent spelling mistakes, does not follow instruction and cannot wait for his turn while playing a game. He is likely to be suffering from - 
Select and explain. 
A. Mental retardation, B. Lack of interest in studies, C. Specific learning disability, D. Examination anxiety
C: Specific learning disability
Answer: C: Specific learning disability 
Explanation: Information in this question are -


Difficulty in expressing himself in written (problem in written expression)
Makes spelling mistakes (problem in spelling).


Both these are manifestations of dyslexia, a specific learning disability.