PEP carboxylase catalyzes carboxylation of phosphoenolpyruvate (PEP, the primary acceptor of \\\\(CO_2\\\\)) to form four carbon compound oxaloacetate in mesophyll cells of \\\\(C_4\\\\) plants. Initial carboxylation reaction of \\\\(C_4\\\\) cycle takes place in mesophyll cell wherein oxaloacetate is converted into the intermediate malate. Malate is transported to bundle-sheath cell and is decarboxylated to produce pyruvate and \\\\(CO_2\\\\). Rubisco present in bundle sheath cells then carries out fixation of released carbon dioxide. Maize is a \\\\(C_4\\\\) with characteristic kranz anatomy consisting of mesophyll and bundle sheath cells. Thus, the correct answer is option A.