This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thyroid and Parathyroid, Subject name: Pathology
Most common Thyroid CA post radiation exposure - 
Select and explain. 
A. Papillary CA, B. Medullary CA, C. Follicular CA, D. None
A: Papillary CA
Answer: A: Papillary CA 
Explanation: Ans. is 'a' i.e., Papillary CA o Radiation induced thyroid carcinoma is papillary carcinoma."Papillary carcinoma accountsfor 80% ofall thyroid malignancies in iodine sufficient areas and is the predominant thyroid cancer in children and individuals exposed to external radiation