Consumers equilibrium is attained at

A. $$\frac{{\vartriangle {\text{x}}}}{{\vartriangle {\text{y}}}} = \frac{{{\text{Px}}}}{{{\text{Py}}}}$$

B. $${\text{MRS}} = \frac{{{\text{Px}}}}{{{\text{Py}}}}$$

C. $$\frac{{\vartriangle {\text{y}}}}{{\vartriangle {\text{x}}}} = \frac{{{\text{Py}}}}{{{\text{Px}}}}$$

D. $${\text{MR}}{{\text{S}}_{{\text{yx}}}} = \frac{{{\text{Px}}}}{{{\text{Py}}}}$$

Answer: Option B