Bone imaging uses strontium-85. There is a concern that Sr-85, a radioisotope, would negatively affect the growing bones of children. Which does not explain this?

• A. Large doses of radioactive strontium can displace calcium in the bones.
• B. The bone cells of children will not absorb Sr-85 because bones contain calcium, not strontium.
• C. The radiation from Sr-85 can lead to weak bones in children.
• D. The bone tissues can get damaged by gamma radiation.

Answer: (B)