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

Solution : Given:
1. Extortioner 2. Extemporize 3. Extinction 4. Extermination 5. Extinguisher

Step 1: Compare the first letter of each word. Since all the words start with the same letter E , then move on to the next letter.
Step 2: The second and third letters of each word are the same, i.e., x and t , then move on to the next letter.
Step 3: Compare the fourth letter of (Ext o rtioner, Ext e mporize, Ext i nction, Ext e rmination, Ext i nguisher). (Extemporize, Extermination) will come before Extortioner, Extinction, Extinguisher as e comes before i and o in alphabetical order. Similarly, (Extinction, Extinguisher) will come before Extortioner as i comes before o in alphabetical order.
Step 4: Compare the fifth letter of (Exte m porize, Exte r mination) and (Exti n ction, Exti n guisher). Extemporize will come before Extermination as m comes before r in alphabetical order. The fifth letter of Extinction and Extinguisher are the same, so move on to the next letter.
Step 5: Compare the sixth letter of Extin c tion and Extin g uisher. Extinction will come before Extinguisher as c comes before g in alphabetical order.

So, the sequence is Extemporize, Extermination, Extinction, Extinguisher, Extortioner, or 2, 4, 3, 5, 1. Hence, the fourth option is correct.