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: Surgery
In case of nodal metastasis, which is not seen on CT scan 
Select and explain. 
A. Spiculated node, B. Size more than 6 mm, C. Necrotic node, D. Rounded node
A: Spiculated node
Answer: A: Spiculated node 
Explanation: None