Correct Option is (2) Uniform motion along the axis
\(\overrightarrow{F} =q(\overrightarrow{V}\times \overrightarrow{B})\)
\(\because\) \(\overrightarrow{V} || \overrightarrow{B} \)
\(\therefore\) \(\overrightarrow{F}=0\)
And magnetic force can never do work
\(\Rightarrow\) Straight line and uniform motion