A body with mass 5 kg is acted upon by a force $\overrightarrow{\mathrm{F}}=(-3\hat{\mathrm{i}}+4\hat{\mathrm{j}})\mathrm{N}$ If its initial velocity at t = 0 is $\overrightarrow{\mathrm{v}}=(6\hat{\mathrm{i}}-12\hat{\mathrm{j}}){\mathrm{ms}}^{-1}$ , the time at which it will just have a velocity along the y-axis is :

• A

  never

• B

  10 s

• C

  2s

• D

  15s