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

Solution : Given:
1. Profess 2. Product 3. Prosecute 4. Precaution 5. Proctor

Step 1: Compare the first and second letters of each word. Since all the words start with the same letter P , and are followed by r then move on to the third letter.
Step 2: The third letter of each word is either e or o . Based on the alphabetical order of these letters, we can arrange them – Pr e caution,  Pr o fess, Pr o duct, Pr o secute, Pr o ctor
Step 3: Compare the fourth letter of (Pro f ess, Pro d uct, Pro s ecute, Pro c tor). Based on the alphabetical order of these letters, we can arrange them – Pro c tor, Pro d uct, Pro f ess, Pro s ecute.

So, the sequence is Precaution, Proctor, Product, Profess, Prosecute, or 4, 5, 2, 1, 3. Hence, the fourth option is correct.