Which statement correctly describes a two-dimensional array in C?

• A. It must be declared as a pointer to an array
• B. It is declared with two dimensions, e.g., int a[3][4]
• C. Each element is a pointer to another array
• D. It grows automatically when more elements are added

Answer: (B)

A two-dimensional array in C is a fixed-size grid stored as a single object, defined by two dimensions. Declaring something like int a[3][4] creates three rows, each with four integers. The whole array is a contiguous block of memory, and its type is int [3][4]; in expressions, it can decay to a pointer to its first row, which has type int (*)[4]. You access elements with a[row][column], so a[1][2] refers to the element in the second row, third column. This structure is an array of arrays, not a sequence of independent pointers to rows, and the elements themselves are ints, not pointers. It does not grow automatically; the size is fixed at compile time unless you allocate storage dynamically.