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: Radiology
[{'content': 'Soft markers on ultrasonography are helpful in diagnosing? \nSelect and explain. \nA. Fetal age, B. Chromosomal anomalies, C. Fetal size, D. Site of pregnancy', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is'b'i.e., Chromosomal anomaliesAntenatal soft ultrasound markers are fetal sonographic findings that are generally not abnormalities as such but are indicative of an increased age adjusted risk of an underlying fetal aneuploidic or some non chromosomal abnormalities.", 'role': 'assistant'}]