Through food chain radioactive Sr is deposited in which part of human body?

The correct option is C Bones
Sr${}^{90}$ is a radioactive isotope of strontium. It is formed in nuclear reactors or during the explosion of nuclear weapons. A large portion of this strontium accumulates in the bone. It behaves like calcium and mostly attaches to the surfaces of bones. This leads to cancer as a result of damage to the genetic material of the bone, nose, and lung and leukemia cells. Thus the correct answer is option D.