Which beer has a typical ABV range of 4.3-5.5?

Altbier is the correct choice as it represents a traditional German beer style typically brewed in the Düsseldorf region. It is characterized by a fermentation style using top-fermenting yeast at cooler temperatures, which contributes to its distinct flavor profile. The alcohol by volume (ABV) range for Altbier falls between 4.3% and 5.5%, making it a sessionable option that is well-suited for various settings.

The other styles listed have different ABV ranges: Kellerbier, commonly unfiltered and young lagers, typically has an ABV around 4.5% to 5.5%, but can vary widely depending on the specific brew. Rauchbier, with its smoked malt character, usually has an ABV similar to that of Kellerbier but often skews higher, around 4.5% to 6%. Eisbock, a strong variant of Bock beer that is concentrated through freezing, typically has a higher ABV, often exceeding 8%. Thus, Altbier's specific ABV range aligns it uniquely within this context.