Correct Answer - Option 2 : 55555
Logic: The number and the number of digits in the term is same and, the number of digits in the second term is one more than the first term.
That means,
2 is two times
3 is three times
4 is four times
So, in the next term 5 will be five times.
Thus, 55555 is related to 4444 in the same way as the second term is related to the first term.