The correct option is D The set of even numbers
An arithmetic progression with finite number of terms is called a finite AP and that with infinite number of terms, an infinite AP.
The set of even numbers upto 10 is 2,4,6,8. ⇒ Finite AP.
The set of even numbers is 2,4,6,8,.......⇒ Infinite AP.
The set of even numbers upto 100 is 2,4,6,8,10,......,96,98. ⇒ Finite AP.
The set of odd numbers upto 100 is 1,3,5,7,.......,97,99. ⇒ Finite AP.
Hence from the given option , the set of even numbers is an infinite A.P