The correct answer is (b), lead sulfide. Lead sulfide is a toxic compound that is used as rat poison. It is a white or gray powder that is insoluble in water. When ingested, lead sulfide can cause a variety of symptoms, including abdominal pain, vomiting, diarrhea, and seizures. In severe cases, lead poisoning can lead to death.
Zinc sulfide is a white or yellow powder that is used in a variety of applications, including pigments, rubber, and plastics. It is not toxic and is not used as rat poison.
Calcium phosphate is a white powder that is used in a variety of applications, including fertilizers, toothpaste, and animal feed. It is not toxic and is not used as rat poison.
Zinc phosphate is a white powder that is used in a variety of applications, including cosmetics, toothpaste, and metal coatings. It is not toxic and is not used as rat poison.