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
Percentage of monozygotic twins with Schizophrenisa is: 
Select and explain. 
A. 0.10%, B. 1%, C. 10%, D. 50%
D: 50%
Answer: D: 50% 
Explanation: D. i.e. 50%