Without the grab handle the passenger will fall, without the medical kit you cannot give first aid, and the minimum for motorcycle tires is 0.8 mm, so operation is prohibited in all cases. In the Armenian original, the first option says the grab handle is missing.
The operation of a motorcycle with a sidecar is prohibited if the passenger's transverse grab handle is missing (fault 6.12), if the residual tread depth of the tires is less than 0.8 mm (fault 4.1) (here it is 0.6 mm), or if the medical kit is missing (fault 6.9). Therefore, all the listed cases are grounds for prohibiting operation.
Option 1. Although a missing grab handle is a fault, the other options also describe conditions that prohibit operation. In the Armenian original, this option says the grab handle is missing.
Option 2. Although 0.6 mm is below the permitted minimum of 0.8 mm, the other listed conditions are also correct.
Option 3. A missing medical kit prohibits operation, but the other options are equally correct.