An elaborate network of filamentous proteinaceous structures present in the cytoplasm which helps in the maintenance of cell shape is called ____________.

The correct option is A Cytoskeleton
The cytoskeleton is a series of intercellular proteins that help a cell with shape, support, and movement. The cytoskeleton has three main structural components: microfilaments, intermediate filaments, and microtubules. The cytoskeleton forms a network of these filamentous structures to maintain the shape of the cell.

Thus, the correct answer is (A).