Which planet has a day longer than its year?

Venus has a day longer than its year: one Venusian sidereal rotation takes about 243 Earth days, while one Venusian orbit takes about 224.7 Earth days. In other words, Venus turns once on its axis more slowly than it travels around the Sun.

Venus also rotates retrograde, in the opposite direction from most planets, including Earth. This unusual spin means that the Sun would appear to rise in the west and set in the east for an observer above the cloud layers. The slow rotation is thought to reflect a complicated balance involving solar tides, gravitational effects, and atmospheric tides produced by Venus's extremely massive atmosphere.

There is an important terminology trap. A sidereal day measures one complete rotation relative to the distant stars. A solar day—the interval from one noon to the next—is about 116.75 Earth days on Venus because retrograde rotation changes how the Sun appears to move across the sky. So the quiz's statement is correct when “day” means the planet's rotation period.