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
Which of the following is true regarding gestational diabetes 
Select and explain. 
A. Gestational diabetes confers an increased risk of congenital malformation., B. If Hb A1c < 6, there is no risk of congenital malformations., C. As pre-conceptional glucose control worsens incidence of congenital malformations increase., D. Highest risk for congenital malformation is seen with Hb A1c level between 7 and 8.
C: As pre-conceptional glucose control worsens incidence of congenital malformations increase.
Answer: C: As pre-conceptional glucose control worsens incidence of congenital malformations increase. 
Explanation: Risk of congenital malformations is more in overt diabetic woman (pre-conceptional Diabetics).