The correct option is C Calyx → Corolla → Androecium → Gynoecium
∙ The four whorls of a flower from outside to inside are:
Calyx → Corolla → Androecium → Gynoecium
∙ Calyx is the outermost whorl of a flower. It comprises of sepals, the small green leaf-like structures.
∙ Corolla is inner to calyx that comprises of colorful petals.
∙ Androecium is the whorl of male reproductive organs. It consists of stamens.
∙ Gynoecium is innermost whorl of a flower. It consists of pistils.