This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Surgery
[{'content': 'Earliest detected fetal anomaly by USG: \nSelect and explain. \nA. Spinal anomaly, B. Craniofacial anomaly, C. Cardiac anomaly, D. Limb anomaly', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans b Ref: Sheila Balakrishnan page 5812nd trimester scan done forA, Nuchal translucencyB, Structural anomaliesEarliest anomaly to be picked up is anencephaly at 10 wks.Some skeletal anomalies- limb reduction defects gross abdominal wall defects- encephalocele, cystic hygroma can also be picked up', 'role': 'assistant'}]