ODD ONE OUT VI

One of the items in each of the following lists is different from the others. Which one - and why?

1)
Red
Blue
Green
Yellow

2)
Morning
Afternoon
Evening

3)
One
Two
Three
Four

4)
Albuquerque
Boston
Chicago
New York City
Philadelphia

Answers:

1. Blue - There is no blue in a traffic light
2. Afternoon - There is no afternoon star.
3. Four - There is no strike four. 
4. Boston - The only city that is the capital of its state