This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Medical, surgical and gynaecological illness complicating pregnancy, Subject name: Gynaecology & Obstetrics
The threshold of hemoglobin A1c for Diagnosis of Ove diabetes in Pregnancy? 
Select and explain. 
A. 6%, B. 6.50%, C. 7%, D. 7.50%
B: 6.50%
Answer: B: 6.50% 
Explanation: Diagnosis of Ove Diabetes in PregnancyMeasure of GlycemiaThresholdFasting plasma glucoseAt least 126mg/dlHemoglobin A1cAt least 6.5%Random plasma glucoseAt least 200mg/dl plus confirmationRef: William&;s Obstetrics; 24th edition; Chapter 57