Moment of inertia of a triangle of base \(b\) height \(h\) about its base can be given as:

(a) \(I_{A B}=\frac{b^{3} h}{12}\)

(b) \(I_{A B}=\frac{b h^{3}}{12}\)

(c) \(I_{A B}=\frac{b h^{3}}{36}\)

(d) None of these