About 50% of the Earth's crust, including the waters on the Earth and atmosphere, is:

A ) Oxygen ✅

B ) Carbon Dioxide

C ) Silicon

D ) None of these

Related Questions
  1. The conversation of Alternate Current into Direct Current is carried out by:
  2. We could see the moon.
  3. The difference between the first two perfect squares that end with 6 is:
  4. The founder of meteorology is:
  5. How many two digits numbers are there which are divisible by 6?
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