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( A xrightarrow[ LiAlH ] [H] B xrightarrow[165^ circ C] H_ 2 SO_ 4 C xrightarrow O_ 3 D ) ( xrightarrow H_ 2 O / Zn 2 HCHO+ZnO+H_ 2 O ) কোনটি A যৌগের সংকেত? | Suva Ai