This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oral cavity, Subject name: Surgery
Which of the following is not an etiological factor for head and neck oral cavity malignancies? 
Select and explain. 
A. Betel nut, B. HPV infection, C. EBV infection, D. Vitamin A deficiency
D: Vitamin A deficiency
Answer: D: Vitamin A deficiency 
Explanation: Risk Factors for Cancer of Oral Cavity * Tobacco * Alcohol * Areca nut/pan masala * Sharp or Jagged tooth * Ill-fitting dentures * Syphilitic glossitis * Human papilloma virus * Epstein-Barr virus * Plummer-Vinson Syndrome * Poor nutrition