Question: You have two arrays, a and b. Which line combines a and b as a list containing the contents of both?

1. `val c = list of (a, b)`
2. `val c = a + b`
3. `val c = listOf(a+b)`
4. `val c = listOf(*a, *b)`

Answer: The correct answer of the above question is Option D:`val c = listOf(*a, *b)`