Correct Answer: 4, 6, 5, 3, 2, 1

Solution : Given:
1. Absurdly   2. Abstriction   3. Abstract   4. Absolutely   5. Abstain   6. Absorber

Step 1: Compare the first letter of each word. Since all the words start with the same letter A , move on to the next letter.
Step 2: The second and third letters of each word are the same. So, move on to the next letter.
Step 3: The fourth letter of each word is u , t , t , o , t , o . Based on the alphabetical order of these letters, we can arrange them – Abs o lutely, Abs o rber, Abs t riction, Abs t ract, Abs t ain, Abs u rdly
Step 4: Compare the fifth letter of (Abso l utely, Abso r ber) and (Abst r iction, Abst r act, Abst a in). Absolutely will come before Absorber in the sequence as l comes before r in the alphabetical system. Similarly, Abstain will come before (Abstriction, Abstract) as a comes before r .
Step 5: Compare the sixth letter of (Abstr i ction, Abstr a ct). Abstract will come before Abstriction in the sequence as a comes before i in the alphabetical system.

So, the sequence is Absolutely, Absorber, Abstain, Abstract, Abstriction, Absurdly, or 4, 6, 5, 3, 2, 1. Hence, the fourth option is correct.