The correct option is D All of these
Wastes
which consist of materials that are non-biodegradable so their destruction
takes a very long time are known as inorganic wastes. Inorganic waste comes
from non-renewable natural resources such as minerals and petroleum, or from
industrial processes. They are only slightly affected by the action of
organisms. They include waste materials such as sand, salt, Iron, Calcium, Mercury,
Arsenic, Cadmium, etc.