A $F=\frac{1}{4\mathrm{π}\in _{0}},\frac{q_{1}q_{2}}{d^{2}}$
B $F=\frac{1}{4\mathrm{π}\in _{0}\mathrm{K}},\frac{q_{1}q_{2}}{d^{2}}$
C F=qE
D $F=\frac{1}{4\mathrm{π}_{7}\in _{0}},\frac{d^{2}}{q_{1}q_{2}}$
Correct Answer: Option D
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