By definition, 'Iamb' refers to the sequence of unstressed and stressed syllables, and 'pentameter' means that there are ten syllables since penta means five. An iamb is a metrical foot that consists of an unstressed syllable followed by a stressed syllable. Therefore, the answer for this would be option A. <span>ten syllables divided into pairs of unstressed and stressed syllables. Hope this helps.</span>