Task: Question Answering
Input (English): Question: In the xy-plane, a triangle has vertices (0,0), (4,0) and (4,6). If a point (a,b) is selected at random from the triangular region, What is the probability that a-b>0?

 Option A: 1/5

 Option B: 1/3

 Option C: 1/2

 Option D: 2/3

 Option E: 4/5
Output (English): Option D