The above reaction gives the best yield for
Primary alkyl halides
Tertiary alkyl halides
Secondary alkyl halides
All yields are similar irrespective of alcohol
As we learnt
Alkyl halides are produced by treating alcohol with
When alcohol treated with , OH group is replaced by Cl.
Normally is use to produce primary alkyl halide but under extreme conditions, it can also produce secondary alkyl halides
Therefore, option (1) is correct.