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

Solution : Given:
1. Sailboat 2. Saint 3. Sailor 4. Sanction 5. Sadly

Step 1: Compare the first and second letters of each word. Since all the words start with the same letter S and are followed by a , then move on to the next letter.
Step 2: The third letter of each word is d, i or n . Based on the alphabetical order of these letters, we can arrange them – Sa d ly, Sa i lboat, Sa i nt, Sa i lor, Sa n ction.
Step 3: Compare the fourth letter of (Sai l boat, Sai n t, Sai l or). Sai l boat and Sai l or will come before Sai n t in the sequence as l comes before n in the alphabetical system.
Step 4: Compare the fifth letter of (Sail b oat, Sail o r). Sail b oat will come before Sail o r in the sequence as b comes before o in the alphabetical system.

So, the sequence is Sadly, Sailboat, Sailor, Saint, Sanction, or 5,1, 3, 2, 4. Hence, the second option is correct.