Correct answer is (a) Column wise inter-relation of two arguments
Best explanation: We have to keep in mind the order while trying to plot two matrix arguments. MATLAB will take the column wise relation between the two arguments.
So, if x=[x1 x2 x3];y=[y1 y2 y3]; plot(x,y)- MATLAB will generate a plot between (x1,y1),(x2,y2) and so on.