The specific chemical reaction and the structures for the options are missing from the provided input text. Consequently, the correct product cannot be determined or verified against the probable answer. In the context of NCERT Organic Chemistry and Name Reactions, questions asking about products that 'cannot be formed' often refer to limitations of specific reactions. For example, the Wurtz reaction is not suitable for preparing unsymmetrical alkanes or methane [1, 2]. Without the specific reaction scheme, a precise explanation is not possible.