What color does Vibrio cholerae produce on TCBS agar?

Vibrio cholerae produces yellow colonies on TCBS (Thiosulfate-Citrate-Bile Salts-Sucrose) agar due to its ability to ferment sucrose. When V. cholerae grows on this selective medium, it utilizes the sucrose present, leading to acid production, which causes a color change in the bromothymol blue indicator in the medium, resulting in the yellow coloration of the colonies.

The other options don't reflect the typical behavior of V. cholerae on TCBS agar, as they do not accurately describe the color indicated by the fermentation of sucrose on this specific medium.