A 32-year-old woman with diabetes mellitus delivers a child after 38 weeks of gestation. Which of the following is the most likely abnormality that might be encountered in this child at bih?

- Tight glucose control in diabetic mother is necessary to prevent overstimulation of fetal pancreas during gestation. - Fetus exposed to hyperglycemia in utero may develop hyperplasia of pancreatic b-cells,-secrete insulin autonomously-hypoglycemia - Increased bih weight is commonly encountered in offspring of diabetic mothers - The incidence of mental retardation is not specifically increased.