The correct option is C C-3 and C-4
As distance increases, strength of Inductive effect decreases.
Inductive effect ceases to operate (or is negligible) after 3rd carbon from the substituent.
4CH3−3CH2−2CH2−1CH2−Cl)
In C-3 and C-4, bond will have least inductive effect as this is the farthest from Cl.