This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
[{'content': 'Which of the following malformation in a newborn is specific for maternal insulin dependent diabetes mellitus? \nSelect and explain. \nA. Transposition of great aeries, B. Caudal regression, C. Holoprosencephaly, D. Menrngmyelocele', 'role': 'user'}, {'content': 'Answer: B \nExplanation: CRS is about 200 times more frequent in patients with diabetes than in normal, healthy women, where the incidence rate is estimated at between 0.2 and 1%. This makes it the most specific fetal malformation in maternal diabetes. Ref: Early Detection of Caudal Regression Syndrome By D. Subtil et al; European Journal of Obstetrics and Gynecology and Reproductive Biology 80 (1998), Pages 109-112. 3. Diabetes in Women: Adolescence, Pregnancy, and Menopause By E. Albe Reece, Donald R. Coustan, Steven G. Gabbe, 2004, Page 195', 'role': 'assistant'}]