A function t_square * create_square(int a, int b, int n) dynamically allocates memory to store a t_square. It dynamically allocates and initializes its top_left field with the call to the function create_point(a, b). It also initializes its side field with the value n.

We then consider the following instruction :

t_square * sq = create_square(1, 2, 3);

Among the following instructions, which one allows us to free all the memory allocated by create_square ?