This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Physiology
Maternal chromosome 15 disomy results in 
Select and explain. 
A. Prader Willi Syndrome, B. Fragile x syndrome, C. Marfan's syndrome, D. Angelman Syndrome
A: Prader Willi Syndrome
Answer: A: Prader Willi Syndrome 
Explanation: .