Question: Your application has an **add** function. How could you use its **invoke** methods and display the results?

1. `println(add(5,10).invoke())`
2. `println(::add.invoke(5, 10))`
3. `println(::add.invoke{5, 10})`
4. `println(add.invoke(5,10))`

Answer: The correct answer of the above question is Option B:`println(::add.invoke(5, 10))`