Emstandard_opt3 suitable for magnetic fields?

The documentation on “emstandard_opt3” (https://geant4.web.cern.ch/node/146) says that it is “designed for any applications required higher accuracy of electrons, hadrons and ion tracking without magnetic field.”

I’m looking at 4-8 MeV photons depositing dose in a water phantom in the presence of a magnetic field that varies from 0-9 T. Inf there is a magnetic field present can I assume that one of the other standard options would be better, say, “emstandard_opt4” or “emstandard_opt0”?

Thanks in advance,
RL