Read the two statements and choose the correct option.

I. Two different residue classes modulo $n$ have no integer in common.

II. Every integer lies in one of the residue classes modulo $n$.

Explanation

1. 01

   An integer has exactly one remainder on division by $n$, so it is in exactly one class: I is true.

2. 02

   And it does have a remainder, so it is in some class: II is true. Together the classes split the integers into $n$ parts.