This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pathology
Which thyroid cancer Occurs after radiation exposure? 
Select and explain. 
A. Follicular, B. Papillary, C. Medullary, D. Anaplastic
B: Papillary
Answer: B: Papillary 
Explanation: Papillary carcinoma (PTC) is the most frequent form of thyroid carcinoma diagnosed after radiation exposure, with a higher prevalence of the solid subtype in young children with a sho latency period and of the classical subtype in cases with a longer latency period after exposure. Molecular alterations, including intra-chromosomal rearrangements, are frequently found. Ref: www.scielo.br>scielo