As per FSS Regulations, the tolerance limit of insecticide Hydrogen phosphide in food grains is —

Correct option is D

✅ (d) None of these:
· The tolerance limit for Hydrogen phosphide (used as a fumigant insecticide) in food grains is not one of the values listed in options (a), (b), or (c).
· The exact permissible limit is specified in detailed FSS regulations but does not match these values.
· Correct adherence to fumigant limits is essential to avoid chemical residues that may be harmful to consumers.
· Food safety authorities monitor these limits rigorously to ensure compliance.
❌ (a), (b), (c): Incorrect or not applicable tolerance values.