Options:
A.
B.
C.
D.
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Earlier discussion
1 older comment kept for context.
Doctor Strange
Alkali, or Alkaline, soils are clay soils with high pH (> 8.5), a poor soil structure and a low infiltration capacity. Often they have a hard calcareous layer at 0.5 to 1 metre depth. A soil may be called as alkaline when the pH of the soil is more than 7.0 pH scale than is less than 7.0 is acidic while pH scale that is greater than 7.0 is alkaline. pH scale that is equal to 7.0 is neutral. Therefore, choice C is correct.