Answer:
the answer and steps are pictured above
The number 7 should be removed from his list to make the list accurate.
You will have 4 pieces.
<u><em>Explanation</em></u>
Suppose, the number of pieces is 
As each piece must be
of a square and you have initially
of a square, so the equation will be.....

So, you will have 4 pieces.
option B is the answer of this question