Correct Answer: A
Explanation:
Since G has 3 non-identity elements, ∴ at least one of them must be equal to its inverse.
Let a = a-1
∴ a2 = a . a-1= e ⇒ a2 = e ∴ O (a) = 2
Also b-1 = c and c-1= b
[or b-1= b, c-1 = c. This will mean O (b) = 2, O (c) = 2]
∴ Hence, (A) is correct answer.