We know,
A body moves with a constant velocity only of there is no net external torque or force.
Case A
no net Electric force
no net magnetic force when is perpendicular to
Case B

There is net Electric as well as magnetic Force, but there is case when both get balanced.
Case C
, Electric force not exists,
magnetic force exist.
Here, one of them os non zero and imbalanced.
Hence it is case when the condition fails.
Case D

Here neither magnetic force exist nor the Electric force.