This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Gynaecology & Obstetrics
[{'content': 'Nuchal translucency is measured between \nSelect and explain. \nA. 8 to 10 weeks, B. 11 to 14 weeks, C. 16 to 18weeks, D. 18 to 20weeks', 'role': 'user'}, {'content': "Answer: B \nExplanation: Nuchal translucency represents the maximum thickness of the subcutaneous translucent area between the skin and soft tissue overlying the fetal spine at the back of the neck. It is measured in the sagittal plane between 11 and 14 weeks using precise criteria. Increased NT is seen inChromosomal abnormalitiesGenetic SyndromesCardiac anomaliesSkeletal deformities(Ref: William's Obstetrics; 25th edition)", 'role': 'assistant'}]