What is the structure of flagella and cilia in eukaryotic cells? I - Flagella and cilia are composed of an elastic filament called axoneme and a c...

What is the structure of flagella and cilia in eukaryotic cells?

I - Flagella and cilia are composed of an elastic filament called axoneme and a contractile cytoplasmic sheath that surrounds the axoneme.
II - The movement of flagella and cilia is due to the vibration of a delicate membrane called the undulating membrane.
III - Cilia are thin, short, and filamentous cellular extensions that can be of uniform length or not.
IV - The basic structure of flagella and cilia is the same in all eukaryotic cells, consisting of two central fibers and nine peripheral double fibers surrounded by a continuous membrane like a film.
a) Only I and II are correct.
b) Only III and IV are correct.
c) I, II, III, and IV are correct.
d) None of the statements are correct.