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: Gynaecology & Obstetrics
Most characteristic anomaly in infant of a diabetic mother: 
Select and explain. 
A. Caudal regression, B. VSD, C. Spina bifida, D. Anencephaly
A: Caudal regression
Answer: A: Caudal regression 
Explanation: Caudal regression