In mulberry, the inflorescence is
A. Catkin
B. Capitulum
C. Spadix
D. Cyathium.

Hint:An inflorescence is a collection or group of flowers consisting of a main branch or even a complex set of branches that are arranged on a stem. In mulberry flowers are produced, with male and female flowers on various trees. Male flowers have four stamens, while female flowers consist of four inconspicuous sepals, closely enveloped by a single pistil.

Complete answer:Catkin: Catkin is the inflorescence in the mulberry. A catkin or ament is a scaly spike or raceme, which usually droops. As such, cymose or other complex inflorescences are often commonly referred to as superficially identical.
Capitulum: Racemose inflorescence (as sunflower) with such an axis cut short and constricted to form a rounded or flattened cluster of sessile flowers.
Spadix: A spadix is a sort of inflorescence of spikes with tiny flowers on a fleshy stem.
Cyathium: A cyathium is one of the specialized pseudanthias that shape the inflorescence of plants. A cyathium (like the one found in euphoria) is shaped by Five bracteoles (rarely four). These are small bracts, joined, which form a cup-like involvement. Their top tips are free and cover the opening of the involvement at the beginning. These alternate with the opening of the involvement. Five nectar glands, which are fused together often. An exceedingly small female flower at the base of the involucre, consisting of an ovary on a short stem with a pistil and a pistil standing in the middle. Five groups of male flowers that are extremely reduced, each consisting of a single anther on a stalk.
Hence, choice A- Catkin is the correct one.

Note: Several fruits produced from the inflorescence may be of mulberry. The unique fruits have very few aches or nutlets, a square measure enclosed by fleshy sepals and sorted to make 'sorosis' in accordance with the flesh axis. Mulberry square leaves are a measure used for rearing silkworms.