Question

What is the additive identity element in the set of whole numbers?

(a) 0 (b) − 1 (c) 1 (d) None of these

Answer 1

An additive identity is a number which when added to any number, the number is unchanged.
For example : 0 + 7 = 7, 0 + 9 = 9, 0 + (− 11) = − 11 etc.
Thus, 0 is the additive identity in the set of whole numbers.
Hence, the correct option is (a).