In the group (G, *), A a,b ∈ G?

a + b ∈ G

ab ∈ G

a * b ∈ G

a - b ∈ G

Explanation

In a group (G, *), the binary operation * is defined in such a way that the result of combining any two elements is always an element in the group. Therefore, if a, b ∈ G, then a * b ∈ G.