Correct Answer: b, a, d, c

Solution : Given:
a. Extol b. Extinct c. Extra d. Extort

Step 1: Compare the first, second, and third letters of each word. Since all the words start with the same letters E , x , and t , move on to the next letter.
Step 2: The fourth letter of each word is o , i , and r . Based on the alphabetical order of these letters, we can arrange them – Ext i nct, Ext o l, Ext o rt, Ext r a.
Step 3: Compare the fifth letter of (Exto l , Exto r t). Extol will come before Extort in the sequence as l comes before r in the alphabetical system.

So, the order is Extinct, Extol, Extort, Extra, or b, a, d, c. Hence, the second option is correct.