Which planet is known as the Red Planet?

Appeared in: RML MAINS 2025

Explanation

Mars is famously known as the 'Red Planet'.
This distinctive reddish color is due to the high concentration of iron oxide (rust) on its surface and in its atmosphere.
It is the fourth planet from the Sun and has been a primary target for space exploration to search for signs of past life.

Option A: Jupiter is a gas giant, the largest planet in our solar system, known for its prominent bands and the Great Red Spot, but it is not the 'Red Planet' itself.
Option C: Venus is known as the 'Morning Star' or 'Evening Star' and is the hottest planet, but its appearance is yellowish-white due to its thick sulfuric acid clouds.
Option D: Mercury is the smallest planet and closest to the Sun. Its surface is rocky and cratered, giving it a grey color, similar to Earth's moon.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain General Knowledge: Solar System Planets as background academic context rather than a clinical decision trigger.
While not a clinical topic, general knowledge questions are a common component of the preliminary sections in many nursing and other competitive entrance examinations.
A broad knowledge base demonstrates well-roundedness and can be beneficial in building rapport with patients from diverse backgrounds.
What if the question asked about the 'Blue Planet'? The answer would be Earth, due to the vast amount of water covering its surface.

How to Approach the Question

First, identify the key phrase in the question, which is 'Red Planet'.
This is a factual recall question that relies on general knowledge about the solar system.
Access your memory for the nicknames of the planets.
Evaluate the given options: Jupiter (largest), Mars (red), Venus (hottest), Mercury (smallest).
Select the option that directly corresponds to the nickname 'Red Planet'.

Concept Tested & Keywords

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Practise the full RML MAINS 2025

Attempt every question from this paper in a timed mock, then review the full solution for each one.