Is the death of the black horse justifiable? Why

Which is an example of perfect iambic pentameter? a. "i have been worth the whistle." b. "whose reverence even the head-lugg'd bear would lick," c. "a man, a prince, by him so benefited! " d. "ere they have done their mischief. where's they drum? " e. "marry, your manhood, mew! "