Question: What will be the value of x after running this code?

1. `{1, 2, 3, 4, 5, 5, 6}`
2. `{5, 6, 1, 2, 3, 4, 5, 6}`
3. `{6, 1, 2, 3, 4, 5}`
4. `{1, 2, 3, 4, 5, 6}`

Answer: The correct answer of the above question is Option D:`{1, 2, 3, 4, 5, 6}`