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

Solution : Given:
1. Sennet 2. Sennight 3. Sennit 4. Seniority 5. Senna

Step 1: Compare the first letter of all the words. Since all the words start will the same letter S , then move on to the next letter.
Step 2: The second and third letters of all the words are the same, i.e. e , n . So, move on to the next letter.
Step 3: Compare the fourth letter of Sen n et, Sen n ight, Sen n it, Sen i ority, Sen n a. The arrangement will be – Seniority, Sennet, Sennight, Sennit, Senna.
Step 4: Compare the fifth letter of Senn e t, Senn i ght, Senn i t, Senn a . Senna will come first as a comes before e , and i . Similarly, Sennet will before Sennight, Sennit as e comes before i according to the alphabetical system. So, the sequence is – Senna, Sennet, Sennight, Sennit.
Step 5: Compare the sixth letter of (Senni g ht, Senni t ). Sennight will come before Sennit as g comes before t according to the alphabetical system.

So, the sequence is Seniority, Senna, Sennet, Sennight, Sennit or 4, 5, 1, 2, 3. Hence, the first option is correct.