<span>The line "Be thou as chaste as ice, as pure as snow" is a phrase that uses simile. This is a type of figure speech where the writer compares one thing with another that is of different kind. In this sentence being chaste was compared to ice and snow that's pure.</span>
It is B. In the passage, Romeo sees her in the tomb, dead-like, and says that she does not look dead. That is situation irony- he is not aware that she is not dead and describes her as it is. Only the audience notices that.