RAS question
Find the odd one out: Mars, Jupiter, Sun, Saturn, Venus
Correct answer: (C) Sun.
The Sun is the odd one out because it is a star, while Mars, Jupiter, Saturn and Venus are planets.
Explanation
This odd-one-out question tests classification, not astronomy in depth. Mars, Jupiter, Saturn and Venus belong to the same class: they are planets in the solar system. The Sun belongs to a different class. NASA describes the solar system as made up of a star, the Sun, along with eight planets and other bodies. That distinction is exactly what the option set is built around. Since the only listed body that is a star rather than a planet is the Sun, it breaks the common pattern and is therefore the odd one out.
Why the other options are wrong
- (A) Mars is not the odd one out because it shares the common category of the set: it is a planet.
- (B) Jupiter is not the odd one out because it is also a planet, matching Mars, Saturn and Venus.
- (D) Venus is not the odd one out because it belongs to the same planet category as Mars, Jupiter and Saturn.
Concept
This tests the reasoning syllabus area of classification or odd-one-out questions. Such items recur in RAS because they check whether candidates can identify the governing category instead of relying on surface familiarity.