Which statement is true about inorganic rodenticides?

Inorganic rodenticides are compounds that are derived from minerals, which classifies them as inorganic substances. These rodenticides typically include materials like arsenic and phosphides, which are naturally occurring elements or compounds found in the earth's crust. Unlike organic rodenticides, which are often derived from living organisms or derived substances, inorganic rodenticides do not come from biological sources.

The rationale behind the other options includes the fact that while some rodenticides can be synthesized chemically, that characteristic pertains more to specific compounds rather than defining the larger category of inorganic rodenticides as a whole. Similarly, minerals are inherently inorganic and thus the natural substances derived from biological origins do not fit into the definition of inorganic rodenticides. The mention of fossil fuels primarily aligns with organic materials, further distancing those compounds from the mineral-based classification that defines inorganic rodenticides.