Which of the following alcohols is (i) most reactive and (ii) least reactive towards Luca's reagent (anhydrous `ZnCl_2` + conc. HCI)?
(a) `CH_3 CH_2 CH_2 CH_2 OH` (b) `CH_3 CH_2 underset(OH)underset(|)(CH) - CH_3` (c ) `(CH_3)_3COH`

Explanation

To determine which of the given alcohols is the most and least reactive towards Lucas reagent (anhydrous ZnCl₂ + concentrated HCl), we need to analyze the structure of each alcohol and understand how their reactivity is influenced by the stability of the carbocation that forms during the reaction.

### Step-by-Step Solution:

1. **Identify the Alcohols**:
- (a) `CH₃CH₂CH₂CH₂OH` (1-butanol)
- (b) `CH₃CH₂(OH)CH(CH₃)` (2-butanol)
- (c) `(CH₃)₃COH` (2-methylpropan-2-ol or tert-butanol)
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