The correct option is
B Capsule
The fruit of Okra is a capsule.
A capsule is a type of simple, dry fruit produced by many species of flowering plants. A capsule is a structure composed of two or more carpels. In Angiosperms (flowering plants), the term locule is used to refer to a chamber within the fruit. Depending on the number of locules in the ovary, fruit can be classified as uni-locular (unilocular), bi-locular, tri-locular or multi-locular. The number of locules present in a gynoecium may be equal to or less than the number of carpels. The locules contain the ovules or seeds. In most cases the capsule is dehiscent, i.e. at maturity, it splits apart (dehisces) to release the seeds within. Okra and its seed pods are also often known as lady's fingers.
Therefore, the correct answer is option B.