Which one of the following is an appropriate example of ’sexual deceit’ ?

Sexual deceit occurs when one organism imitates the sexual signals of another species in order to obtain a short‑term benefit, usually to gain pollination services or a mating advantage without offering a reward.

Among the listed pairs:

Sea anemone and clown fish – this is a classic example of mutualistic protection; the fish gains shelter and the anemone gains cleaning. No sexual mimicry is involved.

Female wasp and fig – this describes the obligate pollination mutualism between fig trees and their fig‑wasp pollinators. The wasp is not tricked sexually; it receives a place to lay eggs.

Ophrys and bumblebee – Ophrys is a genus of orchids that has evolved flowers that closely resemble the shape, colour, texture and even the scent of female bumblebees. Male bumblebees, attracted by these sexual cues, attempt to mate with the flower (pseudocopulation). While the bee is occupied, the orchid deposits or picks up pollen. This direct exploitation of the bee’s sexual behaviour fits the definition of sexual deceit.

Cuckoo and crow – the cuckoo is a brood‑parasitic bird that lays its eggs in the nests of other species (often reed‑warblers, not crows). This is a case of reproductive deceit, not sexual deceit.

Therefore, the only pair that exemplifies “sexual deceit” is Ophrys and bumblebee.