Which planet's diameter is about four times larger than the diameter of Venus?

The diameter of Venus is about 12,100 km. If we calculate four times the diameter of Venus, we get:

4 * 12,100 km = 48,400 km.

Looking at the provided diameters of the planets, the only planet with a diameter close to this value is Uranus, which has a diameter of 51,100 km.

So, the planet that has a diameter about four times larger than that of Venus is **Uranus** (though it's worth noting that it's slightly more than four times). Given the options you've provided, none of them correctly identify Uranus.

If we strictly go by your options though, you would have to choose based on the closest matching or if Uranus was an option, but since it isn’t, none of the given options work.