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Question

O-horizon is a

  1. Solum
  2. Top soil
  3. Sub-soil
  4. Organic layer

A
Top soil
B
Sub-soil
C
Solum
D
Organic layer
Solution
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The O horizon is also called the organic horizon as it is a layer containing the highest amount of organic matter. It is reddish-brown in color. Thus the correct answer is option C.

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