The correct option is D Thalamus, pericarp, placenta and seeds
In cucumber, the edible part is thalamus, pericarp, placenta and seeds. Cucumber (Cucumis sativus) is a widely cultivated plant in the gourd family Cucurbitaceae. The fruit of the cucumber is roughly cylindrical, elongated with tapered ends. Having an enclosed seed and developing from a flower, , cucumbers are classified as accessory fruits. An accessory fruit is a fruit in which some of the flesh is derived not from the ovary but from some adjacent tissue exterior to the carpel.