Which composer-conductor, born in 1840, created the ballets 'Swan Lake', 'The Sleeping Beauty', and 'The Nutcracker'?

• A Modest Mussorgsky
• B Nikolai Rimsky-Korsakov
• C Pyotr Tchaikovsky ✓
• D Igor Stravinsky

Tchaikovsky's three great ballets, along with his symphonies and the 1812 Overture, made him one of the most popular composers of the Romantic era.