A charged particle goes undeflected in a...

A charged particle goes undeflected in a region containing electric and magnetic field. It is possible that

`barV|\ |barB` and `barE` is not parallel to `berB`

`barE|\ |barB` but `berV` is not parallel to `barE`

`barE|\ |barB` ,`barV|\ |barE`

`barE|\ |barB` ,`barV bot barE`

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