Which of these is needed for a vertex-centred arrangement and not for cell-centred elements?

Which of these is needed for a vertex-centred arrangement and not for cell-centred elements? Correct Answer Pre-defined shape functions

Cell-centroids are must for cell-centred arrangements as they are the grid points here. Face-centroids and edge-centroids are also needed here during numerical integration. Pre-defined shape functions are not needed as they use general polygonal elements.
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