Correct Answer :
C. both (a) and (b)
Axoneme with 9 + 2 microtubular arrangement occurs in cilia and flagella. Cilia are hair like growths of the cell membrane. Flagella are comparatively longer and responsible for movement. The axoneme usually has nine pair of centrally located microtubules. Such an arrangement of axonemal microtubules is referred to as the 9 + 2 array.