What four planets are commonly referred to as the "Big 4"?

The commonly referred "Big 4" planets are typically recognized as the four largest planets in our solar system, which are Jupiter, Saturn, Uranus, and Neptune. Since the provided answer is "C," it includes Mars, which is not one of the largest planets, and therefore does not accurately reflect the "Big 4."

The correct understanding of the term "Big 4" relates specifically to the gas giants, Jupiter and Saturn, while Uranus and Neptune are considered the "ice giants." These planets are distinguished by their significant mass and size compared to terrestrial planets like Mars and Earth, which are much smaller and composed primarily of rocky materials.

In summary, the "Big 4" are not correctly identified in any of the given answer choices, highlighting the importance of accurately identifying the largest planets in our solar system.