about last year project in BE(e&tc) in plc or other

hello sir, My last year(BE e&tc) will start within 10 days. i m going to do indusrial automation course(plc, allen bradely, siemens, messung). but i dont know which project are suitable? condition of college is that i should must carry my project in college for exam. should i go with plc project or any other electronics project ? suggest some good projects.