Best Friends

"You two seems to share an unbreakable bond within the few days of college. How come this possible?" The professor asked.

"We are best friends since our school days", both of them said proudly in unison.

Great! But do you remember, how you guys befriended?

"We will never forget that", both of them said smiling at each other.

"What's so special?" The professor asked.

"We were in class sixth. We had our final exams. I was poor in Physics and good at Chemistry. He was brilliant in Physics but hated Chemistry. Luckily his roll was behind me, so l approached him and we made a deal that he will learn Physics and I will learn Chemistry and we will help each other during the exam. We exchanged our answer sheets during the exam but unfortunately, the invigilator caught us and we were expelled. We were scolded by the principal and our parents. We failed and denied promotion for the next class. "And since then we are partners in crime", he said looking proudly to his best friend.

"Interesting! but remember your cheating crime won't work here," the professor warned them.