Answer: B.

Explanation:
Area of a rectangle with dimension " l by w" is given by :-

Area of square with dimension "a by a" is given by :_

Now Using (1), Area of rectangle with dimension 9-inch by 6-inch will be :-
Using (2), Area of square with dimension 4-inch by 4-inch will be :-
Now, the required area =

Hence, B is the correct option.