When dichasial cyme ends into monochasial cyme the inflorescence is
Uniparous
Biparous
Cincinnus
Verticillaster
Option 1: The main axis terminates in flower and it produces one lateral branch from the base, which also terminates in a flower. Each lateral and subsequent branch also produces one lateral branch with a terminal flower.
Option 2: The terminal peduncle terminates in the flower. It gives rise to two lateral branches with terminal flowers. Subsequent branches also behave similarly. E.g. Jasmine, Saponaria
Option 3: Cincinnus inflorescence is a tight, modified helicoid cyme in which the pedicels are very short. alternately on opposite sides of the rachis, due to abortion of opposing paired bud.
Option 4: Verticillaster inflorescence is an inflorescence in which the flowers are arranged in a seeming whorl, consisting in fact of a pair of opposite axillary, usually sessile cymes as in many minutes. A Verticillaster is a fascicle with the structure of a dichasium. It is common among the Lamiaceae. Hence, option 4 is the correct answer