Which of the following is a known risk factor for carcinoma of the cheek?

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It is typically composed of columnar epithelial cells.It is linked to the habit of chewing gum.It is commonly associated with the practice of chewing betel nut.It has a connection with the presence of geographic tongue.None of the above.

Explanation

Carcinoma of the cheek is frequently related to the habitual chewing of betel nut, which is a recognized risk factor. It is not characterized by columnar cells, nor is it associated with chewing gum or geographic tongue.