Who is the detective in Arthur Conan Doyle's mystery stories who is known for his astute observation and violin-playing skills?
A. Sherlock Holmes
B. Hercule Poirot
C. Miss Marple
D. Sam Spade
Sherlock Holmes is the detective in Arthur Conan Doyle's mystery stories, known for his astute observation, brilliant deduction, and skills such as playing the violin.