Which of the following beers is categorized as a Kölsch?

A Kölsch is a style of beer that originates from Cologne, Germany, and is known for its pale, straw-like color, light body, and balanced, slightly fruity flavor profile. It is fermented at cooler temperatures using a hybrid yeast that typically lends a clean and crisp character to the beer. Gaffel is a well-known brand of Kölsch, and it exemplifies the style with its refreshing qualities and adherence to the traditional brewing practices associated with Kölsch production.

In contrast, the other options represent different styles that do not fit into the Kölsch category. Abita Andygator is a Doppelbock, which is a stronger, maltier lager from Germany, characterized by rich caramel and toasted malt flavors. Rogue Dead Guy is an American amber ale that emphasizes a malt-forward profile with caramel and toasty notes, deviating from the lightness and subtlety of Kölsch. Sam Adams is a brand that produces a variety of beers, most famously their Boston Lager, which is a Vienna lager with a more robust character compared to the light and delicate nature of a Kölsch.

Therefore, Gaffel stands out as the correct answer, representing the traditional Kölsch style.