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: Microbiology
Hep-2 cells are the type of 
Select and explain. 
A. Primary cell cultures, B. Diploid cell strain, C. Continuous cell lines, D. Explant culture
C: Continuous cell lines
Answer: C: Continuous cell lines 
Explanation: Continuous cell lines - these are cells of a single type usually derived from cancer cells that are capable of continuous serial cultivation indefinitely.
Standard cell lines derived from human cancers such as HeLa, HeP2 and KB cell lines have been used.