The comma tells us when to pause while reading and helps organize writing. Use a comma between two adjectives to separate them if they are interchangeable.
It was a short, simple play.
[The two adjectives can be interchanged – It was a simple, short play. – use a comma to separate the adjectives.]
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
The correct answer is
The smallest number is the one that comes first while counting.
To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.
21 is the smallest number.