The above inflorescence is a/an
a)	Cyathim	b)	Dichasial cyme	c)	Umbel	d)	Panicle

(a)

Cyathium is the characteristic inflorescence of genus-Euphorbia (but not of the family-Euphorbiaceae). In cyathium, five involucre becomes fused and form a cup-shaped structure, which bears a large single female flower surrounded by numerous, free male flowers.