About Shark's teeth: give way, not a stop requirement: which statement is correct?
At a junction without shark's teeth or priority signs, the driver on the wider or busier road has priority.
Sign B6 and sign B7 mean exactly the same thing: both 'give way'.
Shark's teeth require a full stop, just like sign B7.
Shark's teeth are themselves a traffic sign and are binding, even without a sign next to them.
Explanation
trap: marking as illustration of a sign. Shark's teeth are themselves a traffic sign and are binding, even without a sign next to them. The legal duty is directly in the marking