Final answer:
Ludwig Von Drake is the uncle of Donald Duck introduced on TV in 1961 with a European accent.
Step-by-step explanation:
The uncle of Donald Duck who was introduced on TV in 1961 with a European accent is b) Ludwig Von Drake. Ludwig Von Drake is a Disney character known for his intelligence, quirky personality, and Austrian accent. He was first introduced in the television show "Walt Disney's Wonderful World of Color" in an episode named "An Adventure in Color/Mathmagicland." Unlike his famously frugal nephew, Scrooge McDuck, Ludwig is portrayed as a professor and a man of science, often presenting various educational segments. Although Huey, Dewey, and Louie are Donald Duck's nephews and Scrooge McDuck is indeed an uncle to Donald, they are not characterized by a European accent or introduced in 1961.