A bus carries 90 pounds of one allowed hazardous-material class and 470 pounds total of all allowed hazardous materials. Is that within the passenger-section limits?

1. Yes, because it is not more than 100 pounds of one class and not more than 500 pounds total
2. No, because any hazardous material is forbidden on a bus
3. No, because the total must be below 100 pounds
4. Yes, because labeled hazardous materials have no bus quantity limits