Crinkle leaf of cotton is caused by

Answer: Option C

Crickle leaf of cotton is a disease of cotton crop caused by the toxicity of Manganese. Its toxicity mostly occurs in acidic soils, below pH 5.2. However, sufficient acidity develops in those soils that have a high potential to supply the power of soluble manganese.
In this disease, the leaves appear crinkled and cupped, with stunted growth.