This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Surgery
A person was presented with swelling of the salivary gland. Mild pain was felt by him.Investigation of choice. 
Select and explain. 
A. FNAC, B. Incisional biopsy, C. X ray, D. Excisional biopsy
A: FNAC
Answer: A: FNAC 
Explanation: Here the most accurate answer is FNAC. The first investigation which is done is FNAC. It can be guided by ultrasound as it demonstrates if the lump is intrinsic to parotid or not. Open surgical biopsy is contraindicated unless evidence of gross malignancy is present. Reference : Bailey & love, 27th Edition, page no = 789.