Correct Answer: 3, 4, 2, 1

Solution : Given:
1. Necessary 2. Navigate 3. Nautical 4. Naval

Step 1: Compare the first letter of each word. Since all the words start with the same letter N , move on to the next letter.
Step 2: The second letter of each word is either a or e . Based on the alphabetical order of these letters, we can arrange them – N a vigate, N a utical, N a val, N e cessary
Step 3: Compare the third letter of (Na v igate, Na u tical, Na v al). Nautical will come before Navigate and Naval as u comes before v in alphabetical order.
Step 4: Compare the fourth letter of Nav i gate and Nav a l. Naval will come before Navigate as a comes before i in alphabetical order.

So, the sequence is Nautical, Naval, Navigate, Necessary, or 3, 4, 2, 1. Hence, the second option is correct.