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
[{'content': 'At what value of one hour glucose challenge test will you recommend a standard glucose tolerance test- \nSelect and explain. \nA. 120 mg\\/dl, B. 140 mg\\/dl, C. 150 mg\\/dl, D. 160 mg\\/dl', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer is option 2 - 140 mg/dl A serum blood glucose value greater than 140mg/dl at one hour in an one hour glucose challenge test (O&; Sullivan test) is termed suspicious and requires a formal/standard glucose tolerance test. Done to detect gestational diabetes Ref manual for laboratory and diagnostic test 8/350', 'role': 'assistant'}]