Which of the following relations is symmetric and transitive but not reflexive for the set I = {4, 5}?

Options :

1. R = {(4, 4), (5, 4), (5, 5)}

2. R = {(4, 5), (5, 4), (4, 4)}

3. R = {(4, 5), (5, 4)}

4. R = {(4, 4), (5, 5)}