This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Physiological Changes of Pregnancy, Subject name: Gynaecology & Obstetrics
[{'content': 'During pregnancy, GFR \nSelect and explain. \nA. Increases, B. Decreases, C. Remains Unchanged, D. Increases only in multiple gestations', 'role': 'user'}, {'content': 'Answer: A \nExplanation: GFR increases by 50% as filtering capacity of kidney increases due to - a) Decrease oncotic pressure due to hemodilution b) Increased renal blood flow by 80% in 2nd trimester and 50% in 3rd trimester.', 'role': 'assistant'}]