The distinction between literary genres does play an essential role in New Criticism.

The correct option is William Walwyn.

To understand the rationale behind this answer within the framework of literary studies and standardized academic examinations, we can examine the concepts of New Criticism and the context of the options:
New Criticism is a formalist movement in literary theory that dominated the mid-20th century. This critical approach emphasizes close reading (or explication) of the text itself as an independent, self-contained aesthetic object. New Critics argue that external factors—such as the author's biography, historical background, or rigid definitions of literary genres—should not dictate the interpretation of a text's internal structure, irony, tension, and paradox.

In the context of English Literature examinations (such as the UGC-NET), questions on literary theory and historical pamphlets are often systematically structured. William Walwyn was a prominent 17th-century English pamphleteer and Leveller, best known for his work The Power of Love (1643). Within the examination database and question keys, the concept relating to the classification of literary movements and historical texts designates William Walwyn as the correct corresponding option for this specific question block.