The correct answer is Situational Irony
Step-by-step explanation:
One of the main types of irony, besides verbal and dramatic irony, is the situational irony. In this, a sequence of events does not have the result expect or the result is contradictory. This type of Irony occurs in the excerpt presented because all of the actions of Bobby such as studying on the bus, deciding not to watch Tv to focus on study and completing two different study guides are expected to help Bobby to pass the exam. However, in the end, he falls asleep and fails the test, which is a contradictory and unexpected outcome.