Study the following statements on cilium or flagellum and answer the question.
$(i)$ Cilium / Flagellum contains an outer ring of nine doublet microtubules surrounding two singlet microtubules.
$(ii)$ Cilia are smaller which work like oars,causing the movement of either the cells or surrounding fluid.
$(iii)$ Flagella are comparatively longer and responsible for cell movement.
$(iv)$ Cilium and flagellum are covered with plasma membrane. Which of the above statements are correct?

• A
  $(i)$ and $(ii)$
• B
  $(i), (ii), (iii)$ and $(iv)$
• C
  $(i)$ and $(iv)$
• D
  $(ii)$ and $(iii)$