The correct option is C Centrioles
Centrioles are minute submicroscopic subcylindrical structures that usually occur in pairs (hence, the term diplosome) inside a specialized cytoplasm called centrosphere or kinoplasm. The whole complex is called the centrosome, having two centrioles lying at right angles to each other. Centrioles are required to form basal bodies, cilia, flagella, and astral spindle fibres.