Correct Answer: 41352

Solution : Given:
1. First   2. Frown   3. Fist   4. Fast   5. Floor

Step 1: Compare the first letter of each word. Since all the words start with the same letter F , then move to the next letter.
Step 2: The second letter of each word is – i, r, i, a, l . Based on the alphabetical order of these letters, we can arrange them – F a st, F i rst, F i st, F l oor, F r own.
Step 3: Compare the third letter of (Fi r st, Fi s t). Fi r st will come before Fi s t in the sequence as r comes before s in the alphabetical system.

The sequence will be Fast, First, Fist, Floor, Frown, or 41352. Hence, the third option is correct.