. In this molecule which C - C bond is expected to be having least inductive effect.

→ The partial displacement of σ bonded electrons towards more electronegative atom is called inductive effect.→ It is operated along the (C – C chain) carbon chain.→ As the length of the carbon chain increases, inductive effect strength decreases.→ I.E brings bond polarisation.→ I.E almost all vanishes after fourth carbon. C3 – C4 bond has least inductive effect