Option b) makes the most effective hook: "The Gibson Les Paul guitar is one of the best-selling electric guitars ever made. But I wonder how many people know who Les Paul was?"
This hook effectively piques curiosity by connecting Les Paul's name to the iconic guitar associated with him, while also prompting readers to consider their knowledge about the man behind it. It sets the stage for exploring his impact on music and his personal story, which aligns well with the introductory paragraph.