Which one of the following fungicides is not systemic in nature

Answer: Option B

Thiram fungicides are not systemic.
A SYSTEMIC fungicide may be defined as a fungicidal compound that is readily translocated as such in the plant, rendering the tissues penetrated toxic to fungi.
Thiram is the simplest thiuram disulfide and the oxidized dimer of dimethyldithiocarbamate. It is used as a fungicide, ectoparasiticide to prevent fungal diseases in seeds and crops and similarly as an animal repellent to protect fruit trees and ornamentals from damage by rabbits, rodents and deer.