In which of the following reaction product does not contain 'Peroxy' linkage?
(1) $\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{8} \stackrel{+\mathrm{H}_{2} \mathrm{O}}{\longrightarrow}$
(2) $2 \mathrm{Na} \frac{\text { excess } \mathrm{O}_{2}}{\Delta}$
(3) $2 \mathrm{OF}$ Dimerization
(4) None of these