Option A is incorrect. Microtubules only support and give shapes to cells.
Option D is also incorrect because microfilaments mostly provide supports to cells as well.
<em>The cilia is a slender protuberant structure found on some cells. A variant of the cilia (motile cilia) function in the locomotion of some unicellular eukaryotic organisms using wave-like actions.</em>
<em>The flagella is similar to the cilia in being protuberant as well as functioning as a locomotive structure. However, the flagella is much longer than the cilia and uses whip-like action instead of wave-like action.</em>
