<prompt> Which of the following is primary cell line -Chick embryo fibroblastHela cellsVero cellsWI-38  <response>: Primary cell cultures:These are normal cells freshly taken from the body and cultured. Common examples are monkey kidney,human embryonic kidney,human amnion and chick embryo cell cultures. REF:ANANTHANARAYAN AND PANIKERS TEXTBOOK OF MICROBIOLOGY 9TH EDITION PAGE NO:435 