<prompt> Which of the following is not true about medullary carcinoma of thyroid -Origin is from C cells of thyroidComponent of MEN-1Multicentric in originAmyloid deposition  <response>: Medullary thyroid carcinoma is associated with MEN 2 2A 2B, and not with MEN-1.When medullary thyroid carcinoma occurs as a part of MEN syndrome, it may be multicentric. 