Which brand is known as a common example of scotch whiskey?

Dewar's is indeed a well-known brand that serves as a common example of Scotch whisky. This brand has a long history, originating in Scotland, and is recognized for its blended Scotch whiskies. Dewar's is characterized by its smooth flavor profile, which is a result of careful blending and aging processes.

In contrast, the other options listed refer to whiskey types that are not Scotch. Wild Turkey 101 is a well-known brand of bourbon, specifically from Kentucky, known for its higher proof and rich flavor. Knob Creek is also a bourbon, recognized for its deep and complex taste, typical of American whiskey. Seagram 7 is a blended American whiskey, primarily known for its versatility in cocktails rather than being a traditional Scotch. Hence, Dewar's stands out as the quintessential example of Scotch whisky among the choices provided.