Arrange the given words in the sequence in which they occur in the dictionary.
1. Sickly
2. Shrivel
3. Shrewd
4. Sinful
5. Singer

First letter of all the words are same so verifying the second letter.

The second letter of Shrivel and Shrewd is 'h' which is before 'i' in alphabetical order. So Shrivel and Shrewd are placed before Sickly, Sinful and Singer.

Among Shrivel and Shrewd, the fourth letter of Shrewd is before Shrivel in alphabetical order. So Shrewd is placed first and Shrivel is placed second.

The third letter of Sickly is 'c' which is before 'n' in alphabetical order. So Sickly is placed third.

Among Sinful and Singer, the fourth letter of Sinful is before Singer in alphabetical order. So Sinful is placed fourth and Singer is placed fifth.

$$\therefore\ $$The order of the givens words according to dictionary is Shrewd, Shrivel, Sickly, Sinful, Singer

Hence, the correct answer is Option A