Dictyosomes are unicisternal in
(a) Fungi
(b) Protistans
(c) Algae
(d) Bryophytes

Hint: In the kingdom of eukaryotic species, dictyosomes are unicisternal, and involve microorganisms such as yeasts and moulds, as well as the more common mushrooms. The study of this group is known as mycology.

Complete step by step answer:
- Compressed stacks of membrane- bound pouches are Golgi Complexes. Golgi acts as a packaging plant and modifies the vesicles that the rough endoplasmic reticulum creates. In various cisternae (layers) of the Golgi, the new membrane is formed.
- Dictyosomes, which form the Golgi apparatus, are net- like flat, membrane- bound cavity structures called cisternae. They contain proteins that are processed, modified, sorted, and packed into vesicles from the Golgi bodies that pinch off.
- Unicisternal (i.e. with just one cistern instead of 5 - 8 cisterns) Golgi bodies are present in species belonging to the Fungi Kingdom.
- A cisterna (plural cisternae) is a flattened endoplasmic reticulum and Golgi apparatus membrane disc. It is the simplest Golgi apparatus unit.
- Cisternae (approximately 1 $\mu m$ in diameter) are closed central, flattened, plate- like, or saucer- like compartments that are held or stacked above each other in parallel bundles. Cisternae are divided by a space of 20 to 30 nanometers in each stack that may contain rod- like elements or fibers. Each cisterna’s margins are gently curved so that the Golgi apparatus’s entire dictyosome takes on a bow- like appearance.

So, the correct answer is, ‘Fungi’.

Note: The Golgi apparatus consists of a variety of discrete units called dictyosomes in plant cells, while it exists as a single compact or loose complex called the Golgi apparatus or Golgi complex in animal cells. They are dispersed in a plant cell, although they are closely stacked together in an animal cell.