A charged particle goes undeflected in a region containing electric and magnetic fields. It is possible that
i) `vecE||vecB,vecV||vecE`
ii) `vecE` is perpendicular to `vecB` and both are perpendicular to `vecV`
iii) `vecV||vecB` but `vecE` is not parallel to `vecB`
iv) `vecE||vecB` but `vecV` is not parallel to `vecE`

Options

A. Only i & ii are true
B. Only ii & iii are true
C. Only iii & iv are true
D. Only i, ii & iii are true

Answer

A