Which of the following types of verse is commonly recognized as unrhymed and consists of iambic pentameter?

Blank verse is recognized for its specific structure of unrhymed lines written in iambic pentameter. This means that each line typically consists of ten syllables, alternating between unstressed and stressed syllables, creating a rhythm that is both natural and musical. The absence of a rhyme scheme allows for greater flexibility in expression while still adhering to a consistent metrical form.

In contrast, free verse does not follow a specific meter or rhyme scheme, making it less structured than blank verse. Spondaic verse, characterized by a rhythmic pattern of two stressed syllables, does not fit the criteria described, as it deviates from the iambic pentameter format. Trochaic verse, on the other hand, typically consists of lines created with the opposite rhythm of iambs (stressed followed by unstressed), which distinguishes it further from blank verse. Thus, blank verse is the form that answers the question accurately, emphasizing both its unrhymed nature and its reliance on the iambic pentameter.