Which of the following is a caries promoting element?

A. Molybdenum
B. Selenium
C. Fluoride
D. Vanadium

Ans: Selenium

Role of elements in caries

Cariostatic- F, P
Mildly cariostatic- Mo, V, Cu, Sr, B, Li, Au
Doubtful- Be, Co, Mn, Sn, Zn, Br, I
Caries inert- Ba, Al, Ni, Fe,Pd, Ti
Cariogenic- Se, Mg, Cd, Pt, Pb, Si