$A$ proton enters a magnetic field of flux density $1.5 \,Wb \,m^{-2}$ with a velocity of $2 \times 10^7 \,ms^{-1}$ at an angle of $30^{\circ}$ with the field. The force on the proton will be
- A$2.4 \times 10^{-12} \,N$
- B$24 \times 10^{-12} \,N$
- C$0.24 \times 10^{-12} \,N$
- D$0.024 \times 10^{-12} \,N$
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