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: Medicine
For diagnosis of diabetes mellitus, fasting blood glucose level should be more than: 
Select and explain. 
A. 126 mg/dl, B. 140 mg/dl, C. 100 mg/dl, D. 200 mg/dl
A: 126 mg/dl
Answer: A: 126 mg/dl 
Explanation: Answer is A (126mg/dl): For diagnosis of diabetes mellitus, fasting blood glucose level should be more than or equal to 126 mg/dl or 7mmol/l