Inflorescence with single central achlamydeous female flower surrounded by number of achlamydeous male flowers is
A) Cyathium
B) Verticillaster
C) Spadix
D) Hypanthodium

Hint: In flowering plant reproduction mainly occurs in the flower part. The development, arrangement, and distribution of flowering plants over a stem are called inflorescence.

Complete answer:
>Flowering plants are vascular plants that reproduce through the flowers.
>Angiosperm is the scientific name of flowering plants and they have very different life cycles.
>Cyathium is the special inflorescence which contains the single female flower contained in the center and around by a number of male flowers inside a cup-shaped enclosure .
ex-Euphorbia.
>Verticillaster is a special inflorescence through which flowers are arranged in two opposite cymose groups on each node.
ex-Osmium (Tulsi).
>The spadix is a type of racemose inflorescence in which a spadix is enveloped by a spathe.
ex-maize and bananas.
>Hypanthium is bearing short hair and has the flask-shaped fleshy receptacle a pore
ex-Ficus(peepal).

Additional information:
>The structure of flowers has various parts: Sepal, Petal, Stamen, Filament, Anther, Pistil, Stigma, and Carpel.
>The cyathia flower like properties are underlined by brightly coloured nectar glands and by petal to the nectar glands, or brightly coloured, petal-like bracts positioned under the cyathia.

Hence the correct answer is option’ A’ i.e, Cyathium.

Note:The cyathium has the sterile cyathia which have only one property to produce the nectar. Flowering plants start their lives by seed and then germinates, seeding and maturing as the whole plant.