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
Investigation of choice in diabetic mother with a doubtful abnormal fetus: March 2004 
Select and explain. 
A. USG, B. Glycosylated hemoglobin, C. Amniocentesis, D. Chorionic villous biopsy
A: USG
Answer: A: USG 
Explanation: Ans. A i.e. USG