List of top Organic Chemistry Questions on Nucleophilic and electrophilic substitution reactions (both aromatic and aliphatic) asked in GATE CY

Consider the following reaction sequence, where \(\mathrm{A}\) and \(\mathrm{B}\) are the major products.

In proton-decoupled \(^{13}\mathrm{C}\) NMR spectra, the total number of carbon signals observed for \(\mathrm{A}\) and \(\mathrm{B}\) is (in integer).