912 Road signs Choose 1 answer

Which statement about the following safety sign is correct?

1. ①You may turn left whenever there is no traffic, regardless of the signal.
2. ②On a red signal, you may turn left if it does not obstruct other traffic.
3. ③Because it is unprotected, you cannot turn left without a left-turn signal.
4. ④On a green signal, you may turn left if it does not obstruct other traffic.