Hyperplasia means:
a. excessive motility of a muscle
c. voracious eating
b. abnormal increase in number of cells
d. an increase in size of a cell

I think the best answer from the list of choices given is option B. Hyperplasia means abnormal increase in number of cells. It is also called hypergenesis. It involves the enlargement of an organ or tissue cause by the increase in the reproduction of the cells. 

Your answer is going to be c.