Which sentence is written in the most appropriate tone for a cover letter accompanying a résumé?

I was the best in my class.

I graduated with an honors degree.

I was rather good in many of my classes.

I may have gotten excellent grades, but I found my classes very difficult.

Question

Which sentence is written in the most appropriate tone for a cover letter accompanying a résumé? 

I was the best in my class.

I graduated with an honors degree.

I was rather good in many of my classes.

I may have gotten excellent grades, but I found my classes very difficult.

anonymous · Answer

I graduated with an honors degree.

anonymous · Answer

Agreed ^^