Students take the core units. Students take six course units. One core lecture unit may be deferred till year four and replaced by an option unit. Students take the core units plus three option units. Because the syllabus for PC 3131 Research Masterclasses changes each year, fourth year students are allowed to take PC 3131 for a second time.
Students take the core units plus four option units.
Not more than three postgraduate options may be taken in the fourth year.