In the oil wells, X forms the topmost layer, followed by Y and finally – McqOptions

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1.	In the oil wells, X forms the topmost layer, followed by Y and finally Z. X, Y and Z are respectively
A.	Natural gas, oil and water
B.	Petroleum gas, oil and natural gas
C.	Natural gas, water and oil
D.	Petroleum gas, oil and water.
Answer» B. Petroleum gas, oil and natural gas

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