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
[{'content': 'Effect of PIH on GFR is- \nSelect and explain. \nA. Increase GFR, B. Decrease GFR, C. GFR remains the same, D. GFR can increase or decrease', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In normal pregnancy – changes which occur in renal system are-:', 'role': 'assistant'}]