Which of the following reactions will not result in the formation of carbon-carbon bonds ?

(a) Reimer-Tiemann reaction,
(Here, a new $\mathrm{C}-\mathrm{C}$ bond is formed.) (b) Cannizaro reaction, $$ 2 \mathrm{HCHO} \stackrel{\text { Conc. } \mathrm{NaOH}}{\longrightarrow} \mathrm{CH}_3 \mathrm{OH}+\mathrm{HCOONa} $$ (No new $\mathrm{C}-\mathrm{C}$ bond is formed in this reaction.) (c) Wurtz reaction, $$ 2 \mathrm{RX}+\text { dry Na } \stackrel{\text { Ether }}{\longrightarrow} \mathrm{R}-\mathrm{R} $$ (One new $\mathrm{C}-\mathrm{C}$ bond is formed.) (d) Friedel-Crafts acylation,
Thus, among the given reactions, only Cannizaro reaction does not involve the formation of a new $\mathrm{C}-\mathrm{C}$ bond.