493. In an oil trap formed by an anticline, __________ accumulates on top, __________ in the middle, and __________ at the bottom.

by
A. natural gas, oil, groundwater
B. ground water, oil, natural gas
C. oil, groundwater, natural gas
D. oil, natural gas, ground water
✅ The correct answer is option A.
In an oil trap formed by an anticline, natural gas accumulates on top, oil in the middle, and groundwater at the bottom.

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