This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Amyloid stroma is seen in - 
Select and explain. 
A. Papillary ca. thyroid, B. Follicular ca. thyroid, C. Anaplastic ca. thyroid, D. Medullary ca. thyroid
D: Medullary ca. thyroid
Answer: D: Medullary ca. thyroid 
Explanation: Ans. is 'd' i.e., Medullary Ca. thyroid