If two particles $A$ and $B$ of charges $1.6 \times 10^{-19} \ C$ and $3.2 \times 10^{-19} \ C$ respectively are separated by a distance of $3 \ cm$ in air,then the magnitude of electrostatic force on particle $A$ due to particle $B$ is
- A$5.12 \times 10^{-22} \ N$
- B$5.12 \times 10^{-32} \ N$
- C$5.12 \times 10^{-25} \ N$
- D$5.12 \times 10^{-28} \ N$
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