The value of the expression $\dfrac{\lambda \left ( -\left (- 3+2 \right ),\left ( -2+3 \right ) \right )}{\left ( -\left ( -2+1 \right ) \right )} = \dfrac{\lambda(-(-1),1)}{-(-1)} = \dfrac{\lambda(1,1)}{1} = \dfrac{(1-1)^{2}}{1} = \dfrac{0}{1} = 0.$
So, the correct answer is $(B).$