You have a series of cells, all of which were derived from tumors, and you first need to find out
which ones are malignant. what could you do?
a. see which ones are not overproliferating.
b. find out which ones have a higher rate of apoptosis.
c. karyotype samples to look for unusual size and number of chromosomes.
d. measure metastasis.
e. time their cell cycles.

answer: - b cells

explanation: -

there are many types of white blood cells present in our body. one such class of white blood cells are the lymphocytes. the b cells belong to the lymphocyte class of wbcs. the b cells perform their action against the pathogen by producing specialised proteins called as antibodies. these antibodies are produced as and when the b cells encounter pathogens in response to the antigens present on the surface of the pathogen. these antibodies bind to the antigens present on the pathogen and then, target them for destruction by other cells of the immune system.

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.