Effects of climate is totally nullified by parent materials in which soil order?

Answer: Option A

Effects of climate are nullified by parent materials in Entisol.
Entisols are the soil order having soil of recent origin. These are the soils that do not show any profile development other than an A horizon. It has no diagnostic horizons and most are unaltered from their parent material. It occupies about 16% of the global ice-free land area.