This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
Diabetes mellitus is diagnosed if fasting blood glucose is? 
Select and explain. 
A. >100, B. >126, C. >110, D. >116
B: >126
Answer: B: >126 
Explanation: ANSWER: (B) >126REF: Harrison's 18th ed ch: 344Criteria for the Diagnosis of Diabetes MellitusSymptoms of diabetes plus random blood glucose concentration >11.1 mmol/L (200 mg/dL)orFasting plasma glucose >7.0 mmol/L (126 mg/dL)orHBA1C > 6.5%:orTwo-hour plasma glucose >11,1 mmol/L (200 mg/dL) during an oral glucose tolerance test