Two charges \[{{q}_{1}}\]and \[{{q}_{2}}\]are placed in vacuum at a distance \[d\] and the force acting between them is \[F\]. If a medium of dielectric constant 4 is introduced around them, the force now will be [MP PMT 1994]

• A. \[4F\]
• B. \[2F\]
• C. \[\frac{F}{2}\]
• D. \[\frac{F}{4}\]