A particle of mass 5 kg is moving with a uniform speed of `3 sqrt(2) "cm s"^(-1)` in the XY-plane along the line `y = 2 sqrt(5)` cm. The magnitude of its angular momentum about the origin in `"g-cm"^(2) s^(-1)` is
A. zero
B. 30
C. `30 sqrt(2)`
D. `30 sqrt(10)`