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Basic General Knowledge Questions

21. Planets nearest to the Sun are
 
  • A. Mercury and Uranus
  • B. Earth and Mercury
  • C. Mercury and Mars
  • D. Mercury and Venus
 
22. Which of the following gases is most predominant in the Sun?
 
  • A. Ozone
  • B. Helium
  • C. Hydrogen
  • D. Nitrogen
 
 
23. The brighest star in the sky is
 
  • A. Sun
  • B. Sirius
  • C. Hyades
  • D. Praesepe
 
24. Which planet is known as the Watery Planet?
 
  • A. Jupiter
  • B. Pluto
  • C. Mercury
  • D. Earth
 
25. The circumference of the earth was first calculated by
 
  • A. Aryabhatta
  • B. Galileo
  • C. Wegener
  • D. Eratosthenes