Final answer:
The OECD standard test No. 404 is related to flammable and combustible material.
Step-by-step explanation:
The OECD standard test No. 404 is related to flammable and combustible material. It specifically deals with liquid waste substances that have flash points below 60°C, such as waste oils and used solvents. These substances are considered ignitable and pose a fire hazard under certain conditions.
The correct option from the given choices is d. flammability, as it aligns with the description of the hazardous waste materials covered by the OECD standard test No. 404.