Why is arsenic such an effective poison?

a. because a dosage cannot be found in the body minimal, lethal.
b. because the lethal dosage is both odorless and tasteless.
c. because it can be found in many locations worldwide.

B. Because the lethal dosage is both odorless and tasteless.

Explanation:

Inorganic arsenic compounds are tasteless and odorless. Also, arsenic is easily soluble in water and sometimes undetectable as its odor and colorless. Arsenic poisoning has the same symptoms of food poisoning, and a single dose of arsenic can cause vomiting and diarrhea. Arsenic was used previously to assassinate many kings, and this poison is very dangerous, as many said that it has the taste of a wine. That's why arsenic is such an effective poison.