Which of the following is the area of the red region in sq units?

 Which of the following is the area of the red region in sq units?

	A	$\frac{l^2}{5}$
	B	$\frac{9b^2}{16}$
	C	$\frac{l^2}{3}$
	D	$\frac{3b^2}{16}$

Solution : B