What arrangement consists of "angular" cells?

The arrangement known as "angular" cells is accurately represented by the palisade bacilli arrangement. In microbiology, palisade bacilli typically refer to rod-shaped bacteria that are aligned side by side, resembling a fence or picket arrangement. This unique formation leads to a characteristic angular appearance of the cells when viewed under a microscope. This is particularly notable in certain genera of bacteria, like Corynebacterium, where their arrangement is a distinctive morphological feature.

The other arrangements mentioned have different characteristics. Streptobacilli are long chains of bacilli that appear as rods linked end-to-end, lacking the angular formation. Diplobacilli consist of pairs of rods that are still straight and not angular. Vibrio bacilli have a curved rod shape, resembling a comma, which does not correspond to the angular arrangement either. Thus, the defining angular arrangement of cells is most accurately captured by palisade bacilli.