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
A cold nodule in thyroid scintiscan mean 
Select and explain. 
A. Nodule which is cold, B. Hyperactive nodule, C. Nodule which is nonfunctioning & malignant, D. Nodule which has no signs of inflammation
C: Nodule which is nonfunctioning & malignant
Answer: C: Nodule which is nonfunctioning & malignant 
Explanation: None