Correct Answer: 5, 3, 2, 1, 4

Solution : Given:
1. Migrate 2. Migrant 3. Might 4. Migrator 5. Mig

As we can see, Mig the first three letters are the same in all the words, so we will start observing from the fourth letter of each word.
Step 1: In Mig, we don't have any fourth letter so it will come in first place.
Step 2: Compare the fourth letter of (Mig r ate, Mig r ant, Mig h t, Mig r ator). Might will come before Migrate, Migrant, Migrator in the sequence as h comes before r in the alphabetical system.
Step 3: Compare the sixth letter of (Migra t e, Migra n t, Migra t or). Migrant will come before Migrate and Migrator in the sequence as n comes before t in the alphabetical order.
Step 4: Compare the seventh letter of (Migrat e , Migrat o r). Migrate will come before Migrator in the sequence as e comes before o in the alphabetical order.

So, the sequence will be Mig, Might, Migrant, Migrate, Migrator, or 5, 3, 2, 1, 4. Hence, the second option is correct.