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

Solution : Given:
1. Past  2. Part  3. Poster  4. Pigeon  5. Prelude

Step 1: Compare the first letter of each word. Since all the words start with the same letter P , move to the next letter.
Step 2: The second letter of each word is – a, a, o, i, r . Based on the alphabetical order of these letters, we can arrange them – P a st, P a rt, P i geon, P o ster, P r elude
Step 3: Compare the third letter of (Pa s t, Pa r t). Part will come before Past in the sequence as r comes before s in the alphabetical system.

The sequence will be Part, Past, Pigeon, Poster, Prelude, or 2, 1, 4, 3, 5. Hence, the first option is correct.