This one asks, which of the following topics is not commonly studied in social psychology? So just looking through these really quickly, I can tell that things like attitudes, identity, and stereotypes and prejudice are all really common themes that get studied in social psychology. Whereas sensation and perception in psychology is really like its own thing. It's like its own sub-area in psychology. Now social psychologists can study perception, but they're going to be studying the perception of things like attitudes, identities, stereotypes, etc.
They're not going to be studying literal sensations and perception, such as in taste or smell or audition or things like that. Alright, so our answer here is A, sensation and perception.