Is it mandatory to obey the instructions of a municipal inspector authorised for this, even when the instruction or signal is contrary to the signs?

1. AYes, it is mandatory to obey, and with great care.
2. BNo, it is not mandatory to obey.
3. CYes, except for an instruction contrary to the instruction of a "no entry" sign.
4. DYes, except for an instruction contrary to the instruction of a "stop" sign.

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