If Two Charged Particles, Q₁ and Q₂, Are Separated by the Distance

If two charged particles, Q₁ and Q₂, are separated by the distance r, the electrostatic energy between the particles is $\infty$ _____

A) Q₁× Q₂ + r
B) Q₁× Q₂× r
C) $\frac { r ^ { 2 } } { Q _ { 1 } \times Q _ { 2 } }$
D) $\underline { Q _ { 1 } Q _ { 2 } }$
$r$
E) $\frac { r } { Q _ { 1 } \times Q _ { 2 } }$