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: Microbiology
[{'content': 'Which of the following ultrasound finding has the highest association with aneuploidy? \nSelect and explain. \nA. Choroid plexus cyst, B. Nuchal translucency, C. Cystic hygroma, D. Single umbilical aery', 'role': 'user'}, {'content': 'Answer: C \nExplanation: All the above mentioned are ultrasound findings associated with increased risk of aneuploidy although the highest association is seen with cystic hygroma Nuchal translucency and cystic hygroma are both measured in the first trimesterTrisomy 21 is the most common aneuploidy associated with increased NT and cystic hygroma While monosomy X presents as second-trimester hygroma.', 'role': 'assistant'}]