Dear Tarun, you will mention 2016 as the year you completed your 10+2. This is because though you appeared for Improvement exams, technically by then you joined your Graduation based on your 2016 marks. And the year you completed your 10+2 is 2016. Improvement exams are for those candidates who have completed their 10+2 but want to improve their score. If you have joined Graduation in 2016 you must have given your Improvement exams while studying your 1st year Graduation. But by then you must have submitted the regular marks for admission in Graduation and not your improvement marks. So please enter 2016 as the year you completed your 10+2