Multiple choice general knowledge

A primary fuel is that which is used in the same form as it occurs in nature. Which of the following is not a primary fuel?

  1. kerosene

  2. wood

  3. coal

  4. natural gas
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A Correct answer
Explanation

This is a duplicate of question 21342 with the same error. A primary fuel is used as found in nature. Kerosene is a secondary fuel (refined from crude oil), while wood, coal, and natural gas are primary fuels.

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