This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetics And Genetic Disorders, Subject name: Pediatrics
Genomic imprinting is seen in: 
Select and explain. 
A. Prader Willi syndrome, B. Marfan syndrome, C. Down syndrome, D. Osteogenesis imperfect
A: Prader Willi syndrome
Answer: A: Prader Willi syndrome 
Explanation: a. Prader-Willi syndrome(Ref: Nelson's 20/e p 624-626, Ghai 8/e p 637)Genomic imprinting occurs when the phenotypic expression of a gene depends on the parent of originClassic examples: Prader-Willi syndromeQ and Angelman syndromeQ, Beckwith-Wiedemann syndromeQ, Russell- Silver syndromeQ, pseudohypoparathyroidism and neonatal diabetes.