This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Evaluation of a Thyroid Nodule, Subject name: Surgery
A case of solitary thyroid nodule, Investigation of choice is: 
Select and explain. 
A. T3, T4 estimation, B. Thyroid scan, C. FNAC, D. Excision biopsy
C: FNAC
Answer: C: FNAC 
Explanation: Ans is 'c' ie FNAC "FNAC is the investigation of choice in discrete thyroid swellings"-Bailey & Love