Correct Answer - Option 2 : 15 years

Let the age of daughter be **x** then,

Age of mother = **4x **and,

Age of father = **5x**

According to question,

Age of Father + Age of mother = 135

5x +4x = 135

9x = 135

x = 135/9

x =** 15**

So, Age of daughter = **x = 15 years.**

Hence,** option 2** is the correct answer.