Multiple choice

Stars are seen to rise perpendicular to the horizon by an observer if he is located on the

  1. equator

  2. Tropic of Cancer

  3. South Pole

  4. North Pole
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A Correct answer
Explanation

If the stars are seen to rise perpendicular to the horizon by an observer, then the observer is at the equator because celestial equator is an imaginary circle around the sky directly above Earth's equator. 

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