A straight line passing through `P(3,1)` meets the coordinate axes at `Aa n dB` . It is given that the distance of this straight line from the origin `O` is maximum. The area of triangle `O A B` is equal to `(50)/3s qdotu n i t s` (b) `(25)/3s qdotu n i t s` `(20)/3s qdotu n i t s` (d) `(100)/3s qdotu n i t s`