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: Ophthalmology
Cat eye syndrome is- 
Select and explain. 
A. Paial trisomy 21, B. Paial trisomy 18, C. Paial trisomy 13, D. Paial trisomy 22
D: Paial trisomy 22
Answer: D: Paial trisomy 22 
Explanation: D ie Paial trisomy of 22