The correct option is B flower bud
Clove is an aromatic flower bud. Scientific name of clove is Syzygium aromaticum and belongs to the family Myrtaceae. It consists of a long calyx with four long sepals and four unopened petals which form the small central ball. The flower bud of clove is pale in colour and gradually turns to green and later turns to bright red colour.
The swollen end of the stalk or pedicel of the flower is called thalamus or receptacle.
Ovary is the female reproductive organ whose enlarged basal part bears one or more ovules attached to the flattened cushion-like placenta.
The leaf is borne on the stem and bears a bud in its axil which is called axillary bud. This axillary bud later develops into a branch.