Correct Answer: 4, 2, 3, 1, 5

Solution : Given:
1. Tortoise 2. Torrid 3. Torso 4. Torque 5. Tortuous

Step 1: Since all the words start with the same letter T , so move on to the next letter.
Step 2: The second and third letters of each word are the same, i.e., o , and r . So, move on to the next letter.
Step 3: Compare the fourth letter of (Tor t oise, Tor r id, Tor s o, Tor q ue, and Tor t uous). Torque will come before Tortoise, Torrid, Torso, and Tortuous as q comes before t , r , and s according to the alphabetical system. Similarly, Torrid will come before Tortoise, Torso, and Tortuous as r comes before s , and t according to the alphabetical system. Also, Torso will come before Tortoise, and Tortuous as s comes before t according to the alphabetical system.
Step 4: Compare the fifth letter of (Tort o ise, Tort u ous). Tortoise will come before Tortuous as o comes before u according to the alphabetical system.

So, the sequence is Torque, Torrid, Torso, Tortoise, Tortuous, or 4, 2, 3, 1, 5. Hence, the first option is correct.