The right answer is: A) An unstressed(...)stressed syllable. The iambic pentameter or English white verse is a type of verse of five feet of Iamb, each of which is usually composed of two syllables, one not accented and one accented, and an optional accented syllable at the end. It is a metric that is used in both rhymed verses, as for example in Shakespeare´s sonnets, and in those that lack rhyme.