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: Unknown
Lack of differentiation is called: 
Select and explain. 
A. Anaplasia, B. Metaplasia, C. Dysplasia, D. Carcinoma
A: Anaplasia
Answer: A: Anaplasia 
Explanation: Ref. Robbins Pathology. 9th edition. Page. 269 
Differentiation refers to the extent to which neoplastic parenchymal cells resemble the corresponding normal parenchymal cells, both morphologically and function- ally; lack of differentiation is called anaplasia