Sociology as an optional subject in UPSC Mains is a very popular choice among IAS aspirants. As an IAS officer has to deal with many aspects of thesociety and  the knowledge of sociology helps them deal with the issues of the society in a better wayIAS aspirants will notice  that there is a major overlap in the syllabus of Sociology and topics from General Studies, so they can prepare for the papers simultaneously. Solving Previous year question paper also helps the candidate get clear idea about the type of questions.