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( begin array l C_ 6 H_ 5 COONa+NaOH(CaO) xrightarrow Delta A+Na_ 2 CO_ 3 ~A+CH_ 3 CH_ 2 CH_ 2 Cl xrightarrow AlCl_ 3 , Delta B+HCl end array ) উদ্দীপকের A যৌগটি কোনটি হবে? | Suva Ai