The correct option is
B Branched, aseptate and multi nucleate
Rhizopus is a non- septate fungi, where there are no cross striations. Thus, the cytoplasmic streaming is not restricted to a great extent. Cytoplasm streams inside the hyphae. Hyphae is branched in nature. When there are no separating walls, it makes the hyphae multinucleate.
Therefore, the correct answer is option B.