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Halley's Comet keeps returning to pass by the Earth's atmosphere after a gap of approximately how many years ?
Correct Answer: (d)
Official keyThis question appeared in the NPSC Prelims 2017 examination (GS). It is Question 25 out of 200 questions in this paper.
This question was part of the NPSC Prelims 2017 (GS). The NPSC Prelims examination tests candidates on general studies, current affairs, and aptitude through multiple-choice questions.
Practice previous year questions from all NPSC Prelims papers and compare patterns with UPSC Prelims PYQ to identify overlapping topics.