Hello friends. I am preparing for CSE 2017. I am in 4th year of my college. I wanted to know how is Mechanical engineering as an optional for this exam. How much time does it take to prepare this subject. Also is there a problem of negative scaling in this subject ? Is it possible to secure > 240 in this optional ? Given, that with this optional I can also secure a backup with other exams like GATE, IES, IFOS etc. should I opt for this optional ?