This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetic and genetic disorders, Subject name: Pediatrics
[{'content': "Maternal disomy of chromosome 15 is seen in \nSelect and explain. \nA. Prader - Willi syndrome, B. Klinefelter's syndrome, C. Angelman syndrome, D. Turner's syndrome", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Uniparental disomy occurs when both chromosomes of a pair or areas from 2 chromosome in any individual have been inherited from a single parent. Maternal uniparental disomy is seen in Leader -Willi syndrome. Paternal uniparental disomy is seen in Angelman syndrome . Reference: Nelson TB of pediatrics pg 412 19th edition.', 'role': 'assistant'}]