Find the identity element in the set I+ of all positive integers defined by a * b = a + b for all a, b ∈ I+.

Find the identity element in the set I+ of all positive integers defined by a * b = a + b for all a, b ∈ I+.

A

1

B

2

C

3

D

0

Answer:

The correct option is D. 0

Note