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UPSC 2006: Assertion (A): To orbit around the Sun, the planet Mars takes lesser time than the time taken by the Earth. Reason (R): The diameter of the planet Mars is less than that of the Earth.
(a)Both A and R are true and R is the correct explanation of A
(b)Both A and R are true but R is not a correct explanation of A
(c)A is true but R is false
(d)A is false but R is true
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Not attemptedCorrect Answer: (d) A is false but R is true
Mars revolves round the Sun once every 687 Earth days, which is longer—not shorter—than Earth’s 365-day year, so A is false. Mars’s diameter is about 6,790 km compared with Earth’s 12,756 km, so R is true. Therefore option (d) is correct. ([science.nasa.gov](https://science.nasa.gov/missions/hubble/mars-closest-encounter?utm_source=openai))
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What is the correct answer to this UPSC 2006 Science & Technology question?▼
The correct answer is option (d): A is false but R is true. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Space Technology & Astronomy question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2006, GS Paper 1, as Question 18. It falls under Science & Technology > Space Technology & Astronomy.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
How many UPSC Prelims questions have been asked from Space Technology & Astronomy?▼
UPSC has asked 69 questions from Space Technology & Astronomy (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.