This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Medical, surgical and gynaecological illness complicating pregnancy, Subject name: Gynaecology & Obstetrics
Which of the following is normally present in urine of a pregnant woman in 3rd trimester: 
Select and explain. 
A. Glucose, B. Fructose, C. Galactose, D. Lactose
A: Glucose
Answer: A: Glucose 
Explanation: Glycosuria in pregnancy Repeat and random blood samples taken on one or more occasions throughout pregnancy reveals glycosuria in about 5 -50% cases.During pregnancy renal threshold is diminished due to the combined effect of increased GFR and impaired tubular reabsorption. It is present most commonly in mid pregnancy.Blood sugar level may be well below 180mg/100 ml.No treatment is required and the condition disappears after delivery D.C.DUTTA&;S TEXTBOOK OF OBSTETRICS,Pg no:281,7th edition