Solved UPSC CDS/OTA Question
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Q · Solar System medium · 45s
Which planet is known as Earth's 'twin' due to its similarity in size and composition?
TopicSolar System
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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Venus is often called Earth's twin because it is similar in size, mass, and composition. Despite these similarities, Venus has a dense, toxic atmosphere dominated by carbon dioxide and surface temperatures hot enough to melt lead due to a runaway greenhouse effect, making it inhospitable.
Final Answer: Option B - Venus