Zero Error And Zero Correction

Understanding Zero Error|Zero Error In A Vernier Caliper|Positive Zero Error|Negative Zero Error|Practice Exercise|Screw Gauge|Pitch Of A Screw Gauge|Least Count Of A Screw Gauge|Principle Of Screw Gauge|Method To Use Screw Gauge|Zero Error In A Screw Gauge|Positive Zero Error|Negative Zero Error|Practice Exercise|Summary

Which is correct for zero order reaction ?