Given inflorescence is a :

A. Cyathium looks like a single flower. A cup-shaped involucre formed by bracts encloses a single female flower and a number of male flowers. Each male flower is represented by a single stamen while a single pistil represents a female flower. 
B. Dichasial cyme in which two lateral branches develop on the two sides of a terminal (oldest) flower. Biparous cyme branching is seen. The example is jasmine.
C. Umbel in which the main axis is reduced very much and all flowers appear to be arising from the same point. At the base of flowers, the cluster of bracts forms an involucre. 
D. Verticillaster is a cluster of sessile or subsessile flowers borne on a dichasial cyme ending in monochasial cyme in the form of condensed whorl on either side of the node.