Which one of the following can be a set of velocity components of a two-dimensional flow ?-A-u = x + y and v = x2 + y2B-u = x + y and v = x yC-u = xy and D-u = x2 + y2 and v = x2 y2-B-u = x + y and v = x y

B u = x + y and v = x y du/dx +dv/dy =0. Only B fulfil that hence the answer is option B.