Correct Answer - d
The zoospores are special kind of motile and flagellated spores produced inside the zoosporangia. They are generally naked (without cell wall). The flagella helps to swim in aquatic habitats for proper dispersal. The reproduction by zoorspores occurs in some lower fungi phycomycetes e.g., Albugo, Phytophthora, etc. and some algae (e.g., Chlamydomonas Ulothrix).