The correct option is D polysepalous
Calyx is the outermost whorl of the flower and is made up of sepals. Generally, sepals are green, leaf like and protect the flower in the bud stage. The calyx may have the sepals fused completely or just at the base - gamosepalous; the sepals might be free - polysepalous.
Corolla is composed of petals. Petals are usually brightly coloured and their primary function is to attract insects for pollination. Petals too can be fused or united - gamopetalous; they can be free - polypetalous.