Manganese deficiency causes marsh spot in pea. This disorder is prevalent in which type of soil?

Answer: Option C

Manganese deficiency causes marsh spots in pea. This disorder is prevalent in alkaline soils.
The soils with Marsh Spot contained less salt-soluble manganese than those on which peas were free from the disease, but this relation depended essentially on the contrast between acid and alkaline soils.
Mn serves as a cofactor and a catalyst in various metabolic processes in different cell compartments, such as the oxygen-evolving complex of photosystem II (PSII) or reactive oxygen species scavenging.