The 
The parking place is marked by the 
The red truck is parked parallel to the edge of the road, so it does not violate the rules (unlike other plates showing the parking method, this one applies to all vehicles). The green passenger car is parked at an angle to the edge, which violates the plate's requirement.
Therefore, only the driver of the passenger car violated the rules.
Option 1. The truck is parked parallel to the edge, which is correct and is allowed by the 8.6.1 plate for all kinds of vehicles.
Option 3. The passenger car is parked at an angle to the edge, which violates the requirement of the parking plate.
Option 4. The truck driver parked correctly, so only the passenger car driver violated the rules, not both.