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Photosynthesis is the process typically occurring in green plants by which they synthesize their food (autotrophs). In this process, water and carbon dioxide as reactants produce oxygen and energy (sugar) in the presence of sunlight.

The plant is mainly composed of two types of tissues that are meristematic and permanent tissue. Permanent tissues are further categorized into simple or complex forms. Dermal tissues and ground tissues are simple types of tissues. Ground tissues are mainly composed of parenchymal cells in leaves. The green part of the plants are leaves where photosynthesis takes place. Ground tissues are mainly responsible for the process of photosynthesis.

Apical meristem tissue are responsible for growth of root and shoot system.

Xylem cells are responsible for the water and mineral conduction in plats.

Phloem cell are responsible for the conduction of organic substances of photosynthesis.

Therefore, option ‘b’ is the correct answer.

Ground tissue is the major site for photosynthesis.