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': 'Which of the following condition is associated with cholestasis and butterfly shaped vertebra? \nSelect and explain. \nA. Williams syndrome, B. Alagille syndrome, C. Holt Oram syndrome, D. Turner syndrome', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. Alagille syndromeCholestasis with butterfly shaped vertebra is associated with the Alagille syndrome; cause is mutation in the jagged 1 gene. It has an autosomal dominant inheritance.', 'role': 'assistant'}]