X | Soft porous on the upper side and hard non- porous in the inner side |
Y | Uppermost layer, rich in humus |
Z | Lies below uppermost layer of the soil |
A) X- topsoil, Y- sub soil, Z- bed rock
B) X- bed rock, Y- top soil, Z- sub soil
C) X- bed rock, Y- sub soil, Z- top soil
D) X- sub soil, Y-top soil, Z- bed rock
E) None of these
Correct Answer: B
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