Write the step-by-step mechanism to show exactly how the product isolated is formed. Why is the formation of 4-hydroxy-4-methyl-2-pentanone not a major side reaction? Explain what would happen to the.

a) Keto-enol tautomerization leads to the formation of the product.
b) Rearrangement of intermediates results in the desired product.
c) Elimination of water forms the main product.
d) Proton transfer initiates the reaction.