This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thyroid Malignancies, Subject name: Surgery
Which of the following is the commonest tumour of thyroid - 
Select and explain. 
A. Anaplastic carcinoma, B. Follicular carcinoma, C. Papillary carcinoma, D. Medullary carcinoma
C: Papillary carcinoma
Answer: C: Papillary carcinoma 
Explanation: Ans. is 'c' i.e., Papillary 'Papillary carcinoma accounts for 80% of all thyroid malignancies in iodine-sufficient areas and is the predominant thyroid cancer in children and individuals exposed to external radiation." - SchwartzIncidence of primary malignant tumors of thyroid gland (Harrison 17/e)Type of thyroid carcinomaApproximate PrevalencePapillary Carcinoma80-90%Follicular Carcinoma5-10%Medullary Carcinoma10%Anaplastic CarcinomaRareLymphomas1-2%* Also rememberThyroid carcinoma is the most common malignancy of the endocrine system (Ref: Harrison, 17/e, p 2243)