A typical angiosperm anther is

The correct option is C Bilobed, dithecous and tetrasporangiate
Stamen is the male reproductive organ which possesses a slender stalk called filament and a terminal structure called anther.

Anther is bilobed (dithecous) and each lobe has two pollen sacs (microsporangia) that consist of sporogenous tissue at the center.

Anther is tetrasporangiate as it possesses four microsporangia.

Figure : Dithecous and tetrasporangiate anther

Microsporangia are sac-like structures that bear microspores. Microspores develop into pollen grains (male gametophytes) that produce the male gametes.

(C) Bilobed, dithecous and tetrasporangiate