There was a fight between friends regarding who got the highest marks in the exam. The three friends Aman, Raman and Naman gave following statements to another friend Raju. Raju has to decide who has got the highest marks based on the statements given by them.

They gave following statements:

Aman: I got the highest mark.

Raman: I got the highest mark.

Naman: Aman got the highest mark.

Who has got the highest marks, if only one of the above statements is true?