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: Pathology
Paternal 15 chromosome deletion is seen in ? 
Select and explain. 
A. Angelman syndrome, B. Prader Willi syndrome, C. Down syndrome, D. Turner syndrome
B: Prader Willi syndrome
Answer: B: Prader Willi syndrome 
Explanation: Ans. is 'b' i.e., Prader Willi syndrome Paternal 15 deletion - Prader Willi syndrome. Maternal 15 deletion - Angelman syndrome. Prader Willi syndro-me Angleman syndrome Paternal deletion (Paternal genomic imprinting) Maternal uniparental disomy Maternal deletion (maternal genomic imprinting) Paternal uniparental disomy