Four reagents and specific reactions in which they are involved are given. Identify the wrongly matched option among the following (a) Hot alcoholic KOH \(-\) dehydrohalogenation (b) \(\mathrm{H}^{+} / \mathrm{H}_{2} \mathrm{O}\) - hydration (c) \(\mathrm{H}^{+} / \Delta\) - dehydration (d) Unsymmetrical alkene - anti Markovnikov addition

First, let's recall what each of the reagents does in their respective reactions: (a) Hot alcoholic KOH is a strong base that usually causes dehydrohalogenation in some organic compounds. (b) Adding a positive hydrogen ion, \(\mathrm{H}^{+}\), in the presence of water, \(\mathrm{H}_{2}\mathrm{O}\) usually results in hydration - the addition of water across the double or triple bond. (c) A positive hydrogen ion, \(\mathrm{H}^{+}\), with the application of heat, is usually used for dehydration - the removal of water from the organic compound. (d) Unsymmetrical alkene refers to the presence of an alkene (double bond), with different groups attached to the bonded carbon atoms. Anti-Markovnikov addition refers to the addition of a nucleophile in a manner opposite to the Markovnikov's rule.

Now, the task is to identify the wrongly matched option from the given list. Let's go through each option: (a) Hot alcoholic KOH \(-\) dehydrohalogenation is a well-known reaction, so this option is correct. (b) \(\mathrm{H}^{+} / \mathrm{H}_{2} \mathrm{O}\) - hydration is also correct, as adding \(\mathrm{H}^{+}\) in the presence of water generally results in hydration. (c) \(\mathrm{H}^{+} / \Delta\) - dehydration is also correct since applying heat with the presence of \(\mathrm{H}^{+}\) causes dehydration. Now let's look at option (d). Unsymmetrical alkene is a type of alkene with a double bond, and anti-Markovnikov addition is a way certain reactions add to this double bond. However, this option is not describing any specific reaction or reagent. It's simply describing a type of substrate and a manner of attack, so it's not a matched pair like the other options. So our solution is:

The wrongly matched option among the given ones is (d) Unsymmetrical alkene - anti Markovnikov addition.