A) Gravel, sand, sandy mud, mud
B) Sand, gravel, sandy mud, mud
C) Sandy mud, mud, sand, gravel
D) Mud, sandy mud, gravel, sand
Correct Answer: A
Solution :Materials are deposited according to size of their grains. Materials with largest grains are deposited first, and those with smallest grains are deposited last. According to decreasing size of the grains, the correct sequence is gravel, sand, sandy mud and mud.
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