This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
Factors that have been associated with an increased incidence of head and neck carcinomas include all of the following except 
Select and explain. 
A. Syphilis, B. Hepatitis B virus, C. Exposure to nickel, D. Alcohol consumption
B: Hepatitis B virus
Answer: B: Hepatitis B virus 
Explanation: .