This question tests knowledge of famous painters and their well known works.
Vincent van Gogh: Correct. Van Gogh painted several famous flower series including Irises, Sunflowers, and other floral studies like poppies and roses, done in his bold, thick brushstroke style during the late 1880s.
Sandro Botticelli: Not correct. Botticelli was a Renaissance painter known for works like The Birth of Venus, not these flower paintings.
Leonardo da Vinci: Not correct. Da Vinci is known for the Mona Lisa and The Last Supper, not floral series.
Michelangelo: Not correct. Michelangelo is known for sculpture and the Sistine Chapel ceiling, not these paintings.