Final answer:
The thyroid gland is the least radiosensitive organ among the options listed due to its lower sensitivity to radiation compared to rapidly dividing cells like skin, reproductive cells, and lymphocytes.
Explanation:
Thyroid gland is the least radiosensitive among the options provided. Rapidly dividing cells like those in the skin, reproductive cells, and small lymphocytes are more sensitive to radiation due to their high proliferation rates. Skin, reproductive organs, and lymphocytes can be significantly affected by radiation exposure.
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