This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Etiology: Carcinogenic Agents, Subject name: Pathology
Radiation exposure during infancy has been linked to 
Select and explain. 
A. Breast, B. Melanoma, C. Thyroid, D. Lung
C: Thyroid
Answer: C: Thyroid 
Explanation: Ans. (c) ThyroidRef: Robbin's pathology 9th ed. /109* The most radio-sensitive organ sites in children in the order of sensitivity are thyroid, breasts, bone marrow and brain.* Exposure to ionizing radiation in first 2 decades predisposes a person for development of papillary CA.