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
Impaired oral GTT indicated by- 
Select and explain. 
A. Fasting plasma sugar > 126 mg\/dl, B. Random blood sugar > 200 mg\/dl, C. Fasting blood sugar < 90 mg\/dl, D. Fasting blood sugar <126 mg\/dl and two hours after glucose load 140-199 mg\/dL
D: Fasting blood sugar <126 mg\/dl and two hours after glucose load 140-199 mg\/dL
Answer: D: Fasting blood sugar <126 mg\/dl and two hours after glucose load 140-199 mg\/dL 
Explanation: Impaired glucose tolerance : Fasting blood sugar <126 mg/dl and two hours after glucose load 140-199 mg/dL. Impaired fasting glucose : Fasting blood sugar 110-125 mg /dL mg/dl and two hours after glucose load <140mg/dLDiabetes : Fasting blood glucose > 126 mg/dL and 2 hr after glucose load > 200 mg /dL Reference : page 809 Davidson's Principles and practice of Medicine 22nd edition