what would you do if someone said that you did something wrong and you didn't?

Its not wrong to accused someone if you have an evidence..
   If someone will said that i did something wrong,i will be angry, instead i will tell her the truth. i will also ask him/her to give me an evidence that i did something wrong. If he/she has no evidence then i will tell her not to accused someone directly is he/she has no evidence to prove that i did something wrong..