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: Gynaecology & Obstetrics
Gestational diabetes is usually diagnosed at: 
Select and explain. 
A. I trimester, B. II trimester and and III trimester beginning, C. At time of delivery, D. Perinatal period
B: II trimester and and III trimester beginning
Answer: B: II trimester and and III trimester beginning 
Explanation: II trimester and and III trimester beginning