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
A 42-year-old male has strong positive Benedict's test, random blood sugar is > 163 mg%, fasting blood sugar is > 200 mg% Next line of investigation is - 
Select and explain. 
A. Urine glucose charting 5 hourly, B. Oral GIT, C. Repeat benedict's test, D. 24 hr urine sugar estimation
B: Oral GIT
Answer: B: Oral GIT 
Explanation: None