The major organic product formed from the following reaction :

The question seems incomplete as it doesn't provide the reactants or the specific reaction conditions. However, in general, when considering organic reactions, the major product can depend on various factors including the reactants, catalysts, temperature, and solvent used. Without the specific details of the reaction, it's challenging to predict the major organic product. Typically, reactions can lead to a variety of products based on the reaction mechanism, which could involve substitution, elimination, addition, or rearrangement reactions, among others. The correct answer would depend on understanding the specific reaction type and conditions.