This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
[{'content': 'Prader-Wili syndrome includes the following except- \nSelect and explain. \nA. Congenital hypotonia, B. Obesity and hyperphagia, C. Mental retardation, D. Cafe-au lait spots', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Robbins basic pathology. 6th edition. chapter 6 genetic disorders. page no.180 prader willi syndrome is characterised by mental retardation,sho stature,hypotonia,obesity,small hands and feet, and hypogonadism. so the answer ia option 4. In all cases deletions affects the paternally derived chromosome no.15.', 'role': 'assistant'}]