Which stain is most likely to result from the consumption of betel leaf?

The consumption of betel leaf is commonly associated with the formation of brown stain on the teeth. This is due to the presence of various pigments and tannins found in the betel leaf and the areca nut, which can lead to discoloration over time. When these substances come into contact with the teeth, they can create a brown stain that is often more pronounced in individuals who regularly consume betel leaf products.

As a result, the correct answer reflects the direct impact on dental aesthetics caused by these common dietary habits, emphasizing the relationship between specific foods or substances and the type of dental stains they can produce. Understanding this connection is crucial for dental professionals when assessing and managing oral health in patients.