Which answer matches this clue: the 19th-century violin virtuoso whose 24 Caprices are a cornerstone of the solo violin repertoire?

• A Arcangelo Corelli
• B Giuseppe Tartini
• C Giovanni Battista Viotti
• D Niccolò Paganini ✓

Paganini's technical innovations including left-hand pizzicato and ricochet bowing led contemporaries to whisper that he had sold his soul to the devil.