The ratio of the length and depth of a simply supported rectangular beam which experiences maximum bending stress equal to tensile stress, due to same load at its mid span, is
A
$$\frac{1}{2}$$
B
$$\frac{2}{3}$$
C
$$\frac{1}{4}$$
D
$$\frac{1}{3}$$
Correct Answer: $$\frac{2}{3}$$