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Question
Identify the correct order of steps in petroleum production.
P: Petroleum is transported to oil refineries.
Q: Petroleum is extracted from the oil wells.
R: Purified petroleum is sent to retailer units for different purposes.
S: In refineries, impurities are removed, and useful components are separated from the petroleum.
P: Petroleum is transported to oil refineries.
Q: Petroleum is extracted from the oil wells.
R: Purified petroleum is sent to retailer units for different purposes.
S: In refineries, impurities are removed, and useful components are separated from the petroleum.
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