1. It is a type of petroleum with a lower level of Sulfur
  2. It is a type of petroleum with high level of Sulfur
  3. It is a type of petroleum with high level of hydrogen sulfide
  4. None of the above
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1 Answers

Option 1 : It is a type of petroleum with a lower level of Sulfur

The terms sweet and sour are a reference to the sulfur content of crude oil used in the manufacture of petroleum. Crude is currently considered sweet if it contains less than 0.5% sulfur. Sweet crude is easier to refine and safer to extract and transport than sour crude.
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