Correct Answer: 1, 5, 2, 3, 4

Solution : Given:
1. Exploit 2. Explosive 3. Exponent 4. Exposition 5. Explore

Step 1: Since all the words start with the same letter E , so move on to the next letter.
Step 2: The second and third letters of each word are the same, i.e. x , and p . So, move on to the next letter.
Step 3: The fourth letter of each word is either l or o . The arrangement can be – (Exploit, Explosive, Explore), (Exponent, Exposition).
Step 4: The fifth letter of (Expl o it, Expl o sive, and Expl o re) is the same. So, move on to the next letter.
Step 5: Compare the sixth letter of (Explo i t, Explo s ive, Explo r e). Exploit will come before Explosive and Explore as i comes before s , and r according to the alphabetical system. Similarly, Explore will come before Explosive as r comes before s according to the alphabetical system.
Step 6: Compare the fifth letter of (Expo n ent, Expo s ition). Exponent will come before Exposition as n comes before s according to the alphabetical system.

So, the sequence is Exploit, Explore, Explosive, Exponent, Exposition, or 1, 5, 2, 3, 4. Hence, the second option is correct.