Hint: Chloroplasts are found in the bundle sheath cells of C4 plants. Carbon dioxide fixation occurs only in one location in C3 plants. Carbon dioxide fixation occurs twice in C4 plants (one in mesophyll cells, second in bundle sheath cells). C3 plants only have one $CO_2$ acceptor.
Complete answer: Cooperative photosynthesis is a type of photosynthesis free of excessive losses, photosynthesis in C4 plants is highly cooperative. As a result, these plants have almost no photorespiration. C4 plants have a distinct plant anatomy known as the Kranz anatomy. Because this type of photosynthesis is free of excessive losses, photosynthesis in C4 plants is highly cooperative. And there are two types of photosynthetic cells: mesophyll cells and bundle sheath cells. Both of these work together to improve photosynthesis efficiency.
So, the co-operative photosynthesis is found in C4 plants.
Note: Kranz anatomy is a specialised structure in C4 Plants in which the mesophyll cells form a ring around the bundle-sheath cells. The number of chloroplasts in bundle-sheath cells exceeds that of mesophyll cells. This is found in C4 grasses like maize as well as a few dicots.