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Based on the Coulomb gauge, the accurate Klein-Gordon equation in staticscalar and vector potentials was derived from Klein-Gordon equation inelectromagnetic environment. The correct equation developed in this commentdemonstrates that so-called the Klein-Gordon equation with scalar and vectorpotentials is incorrect; therefore, some papers published to solve Klein-Gordonequation with equal scalar and vector potential are also wrong.

On solution of Klein-Gordon equation in scalar and vector potentials