JEE-Main 2016 was held on April 3rd 2016 in offline mode.
While some questions did appear to be tricky and had more than 1 correct answer, overall the exam appeared to be not too difficult.
PrepLadder experts have compiled the answer key to all the sets from the JEE-MAIN 2016 exam.
JEE-MAIN 2016 Answer Key all sets
Click here to download JEE-MAIN answer key in pdf form
Also Read : JEE-MAIN 2016 expected cutoff
Best Wishes !!