Is it obligatory to obey the directions and signals of a policeman, even when a certain direction or signal is opposed to the traffic signs?

1. Yes, except for directions which contradict a stop sign.
2. Correct answer: Yes, it is obligatory to obey with full caution.
3. No, it is not obligatory to obey
4. Yes, except for directions which contradict a no-entry sign.

WhyYou obey a police officer even against the signs, but with extra caution. The direction overrides even 'Stop' and 'No entry'.