Statement 1: Mars is indeed known as the Red Planet due to the prevalence of iron oxide on its surface and is a neighbour planet to Earth. (True) Statement 2: Mars has two small moons, Phobos and Deimos. Callisto is a large moon of Jupiter. (False) Statement 3: Mars has been the target of numerous missions (orbiters, landers, rovers) by various space agencies, making it the most explored planet other than Earth. (True) Statement 4: Mercury is the smallest planet in our solar system. Mars is the second smallest. (False)