Correct Answer: 2, 1, 3, 4

Solution : Given:
1. Incompatible 2. Incomparable 3. Incongruous 4. Inconsistent

Step 1: Compare the first, second, third, and fourth letters of each word. Since all the words start with the same letter I and have the same letters n , c , and o , then move on to the next letter.
Step 2: The fifth letter of each word is either n or m . Based on the alphabetical order of these letters, we can arrange them – Inco m patible, Inco m parable, Inco n gruous, Inco n sistent.
Step 3: Compare the eighth letter of (Incompa t ible, Incompa r able) and the sixth letter of (Incon g ruous, Incon s istent). Incomparable will come before Incompatible in the sequence as r comes before t in the alphabetical system. Similarly, Incongruous will come before Inconsistent as g comes before s .

So, the sequence is Incomparable, Incompatible, Incongruous, Inconsistent, or 2,1, 3, 4. Hence, the fourth option is correct.