$$\begin{gathered} Q117. Which one dental formula represent a heterdont placental draught and tough animal? \\ \left(A\right) I^{\frac{3}{3}} , C^{\frac{1}{1}} ,P{M}^{\frac{4}{4}}, M^{\frac{2}{3}} \\ \left(B\right) I^{\frac{3}{3}} , C^{\frac{1}{1}} ,P{M}^{\frac{3}{2}}, M^{\frac{1}{1}} \\ \left(C\right) I^{\frac{2}{1}} , C^{\frac{0}{0}} ,P{M}^{\frac{3}{2}}, M^{\frac{3}{3}} \\ \left(D\right) I^{\frac{3}{3}} , C^{\frac{1}{1}} ,P{M}^{\frac{4}{4}}, M^{\frac{3}{3}} \end{gathered}$$