# Problem Which array declaration isn't valid? ```c arr[][] = {{1,2}, {3,4}, {5,6}}; arr[] = {1, 2, 3, 4, 5, 6}; arr[6] = {0}; arr[3][2] = {{1,2}}; ``` # Process ... # Answer ```c arr[][] = {{1,2}, {3,4}, {5,6}}; ```