The correct option is A Zone of exclusion
The Golgi apparatus is a complex organelle made up of membrane-lined stacks of cisternae, a network of tubules, vesicles and vacuoles. Golgi apparatus is surrounded by a clear zone of exclusion in which ribosomes, mitochondria, plastids, storage granules etc are absent. Zones of exclusion is the area free from ribosomes and surrounded by ER. Thus, the correct answer is option A.