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
[{'content': 'What is the disease in which these hand abnormalities are seen? \nSelect and explain. \nA. Down syndrome, B. Osteogenesis imperfecta, C. Turner syndrome, D. Marfan syndrome', 'role': 'user'}, {'content': 'Answer: D \nExplanation: d. Marfan syndromeA - ArachnodactylyB - Steinberg sign (thumb tip extends from palm of hand, in a closed fist)C - Walker-Murdoch sign (thumb & 5th finger overlap each other, when opposite wrist is gripped)', 'role': 'assistant'}]