The correct option is C Lower part
Apophysis is the solid, somewhat swollen basal, green photosynthetic portion of the capsule. It is sterile in nature. It also helps in conduction of water and food materials. It gradually narrows down into seta; hence it is also called as the neck of the capsule. Internally the apophysis is covered by epidermis. In capsule of Funaria stomata present only in apophysis.