When asked that if Aamir Khan, 50, could essay a college student in "3 Idiots", what made him think he isn't apt for a new SOTY instalment, Arjun said: "I am playing a student in 'Half Girlfriend' also, but 'Student of the Year' comes in a teenager type of space. And it also depends on who is making the film, the other actors with whom I share the screen and the material.