question_answer

If \[{{\left( \frac{5}{3} \right)}^{-5}}\times {{\left( \frac{5}{3} \right)}^{-11}}={{\left( \frac{5}{3} \right)}^{8a}}\]then the value of a is equal to?

A)  2                                

B)  \[-2\]

C)  \[-3\]                           

D)  \[-1\]

E)  None of these