In this above question 

add this by separatong integral part and fractional part.

$$\begin{gathered} =\left(6+3+3\right)+\left(\frac{2}{3}+\frac{3}{5}+\frac{5}{6}\right) \\ =\left(12\right)+\left(\frac{20+18+25}{30}\right) \\ =12+\left(\frac{63}{30}\right) \\ =12\frac{21}{10} or 14\frac{1}{10} \end{gathered}$$

Hence, Option C is correct.