Which set of expressions represents three consecutive integers?

1. n, n + 1, n + 2

2. n, n + 2, n + 3

3. n, n + 2, n + 4

4. n, n + 3, n + 5

Consecutive integers have similar characteristics in such a way that their difference is their differences is always one. For example, 1,2,3 ...

the difference between the consecutive integers is 1. therefore if the first integer is n, the next one will be:

n, (n+1), (n+1+1), ...

this will give us:

n, n+1, n+2, ...

the answer is:

1. n, n+1, n+2, ...