This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diagnosis in obstetrics, Subject name: Gynaecology & Obstetrics
[{'content': 'About AFP all are true except: \nSelect and explain. \nA. MSAFP detected 16-18 weeks of gestation, B. Diabetic patients have increased AFP level, C. MSAFP is unrelated to period of gestation, D. Decreased in down syndrome', 'role': 'user'}, {'content': "Answer: B \nExplanation: AFP increased in wrong gestational age Rh isoimmunisation open neural tube defects multiple pregnancy IUFD Anterior abdominal wall defects renal anomalies D.C.DUTTA'S TEXTBOOK OF OBSTETRICS,Pg no:106,7th edition and refer to previous question", 'role': 'assistant'}]