[" 26.In which step of Krebs "cycle,"CO_(2)" is evolved? "],[" (A) Isocitric acid "rarr" Oxalosuccinic acid "],[" (B) Succinic acid "rarr" Fumaric acid "],[" (C) Oxalosuccinic acid "rarr alpha" -ketoglutaric acid "],[" (D) Malic acid "rarr" Oxaloacetic acid "]