Final answer:
The correct order of tissue sensitivity to ionizing radiation, from most to least sensitive, is bone marrow, reproductive organs, and skin. This is because rapidly dividing cells in bone marrow and reproductive organs are more vulnerable to radiation.
Step-by-step explanation:
The question is asking to rank tissues in order of their sensitivity to ionizing radiation. The correct order from most sensitive to least sensitive is: bone marrow, reproductive organs, and skin. This ordering is because tissues with rapidly dividing cells, like bone marrow and reproductive organs, are more susceptible to the harmful effects of radiation. Bone marrow, being a source of blood cell production, and reproductive organs, for their role in producing offspring, are critical tissues that are highly sensitive to ionizing radiation. Skin cells also undergo regular division but at a slower rate, making the skin less sensitive compared to the former tissues. Thus, the right answer would be option (a) Bone marrow, reproductive organs, skin.