<prompt> Which of the following is non-motile?C histolyticumC perfringensC ramosumC.botulinum  <response>: Clostridia are Gram positive, obligate anaerobes , spore forming bulging bacilli. All are motile by peritrichous flagellae except Cl.perfringens and Cl.tetani type VI. Motility - stately They are noncapsulated except C. perfringens and C. butyricum. 