A proton moving with a velocity, \[2.5\times {{10}^{7}}m/s\], enters a magnetic field of intensity 2.5T making an angle \[{{30}^{o}}\] with the magnetic field. The force on the proton is [AFMC 2000; CBSE PMT 2000]

• A.            \[3\times {{10}^{-12}}N\]       
• B.            \[5\times {{10}^{-12}}N\]
• C.            \[6\times {{10}^{-12}}\]N       
• D.            \[9\times {{10}^{-12}}N\]