Which classic comedy routine is associated with Bud Abbott and Lou Costello?

What is the weight class of a pro boxer whose top weight is 160 pounds? To which class of instruments does the flute belong? Which 1930 gangster film ends with the line "Mother of mercy, is this the end of Rico?" Which classic 1950 film includes the line "All right, Mr. DeMille, I'm ready for my close-up"? Claude Bessy long directed the ballet school of which European capital's opera? Claude Brown's 1965 autobiographical book about growing up in Harlem is "Manchild in" what? Claude Rains beats Lon Chaney Jr. to death with a silver walking stick in which 1941 film? Claude Rains played which elusive character in a 1933 film?