Two charges separated by $1$ m exert a $10\mathrm{.}0-$N force on each other. If the charges are pushed to $2-$m separation, the force on each charge will be

Question $35$Select one:

a$.$

$2\mathrm{.}5$ N

b$.$

$20$ N

c$.$

$40$ N

d$.$

$10$ N