Correct Option: D

Certain plans which possess the C₄ dicarboxylic acid pathway of CO₂ fixations show a structural dimorphism of chloroplast structure. Sugarcane is a common example of C₄ plant that has dimorphic chloroplast. The mesophyll cells possess chloroplasts with well developed grana whereas the bundle sheath chloroplasts lack the organization of grana (Agranal chloroplasts). The malic acid is transported to the bundle sheath chloroplast (Transportations). Here it is converted to pyruvic acid and CO₂ by NADP+ malic enzyme (Decarboxylation). The pyruvic acid is then transported to mesophyll chloroplasts (Transportation).