Which of the following declaration are illegal?

• A. int a[][] = {{1, 2, 3}, {2, 3, 4, 5}};
• B. int *a[] = {{1, 2, 3}, {2, 3, 4, 5}};
• C. int a[4][4] = {{1, 2, 3}, {2, 3, 4, 5}};
• D. none of the mentioned