Chemistry Question 84 – NEET-UG 2025

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : ${\text{CH}}_3{\text{CH}}_2{\text{CH}}_2{\text{CH}}_2\text{I}$ undergoes ${\text{S}}_{\text{N}}2$ reaction faster than ${\text{CH}}_3{\text{CH}}_2{\text{CH}}_2{\text{CH}}_2\text{Cl}$. Reason (R) : Iodine is a better leaving group because of its large size. In the light of the above statements, choose the correct answer from the options given below :