Definition: In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
Input: Question: What is the most common malignant tumor of the thyroid? 
 Options:  <1> Oxyphilic carcinoma <2> Papillary carcinoma <3> Follicular carcinoma. <4> Anaplastic carcinoma <5> Spinal carcinoma
