There are __________ main types of cell division.

Correct option is A

There are 2 main types of cell division. So, the answer is (a).
The two main types of cell division are mitosis and meiosis.
· Mitosis is the process by which a cell divides into two identical daughter cells. It is the type of cell division that occurs in most cells of the body.
· Meiosis is the process by which a cell divides into four daughter cells, each with half the number of chromosomes as the parent cell. Meiosis is the type of cell division that occurs in sex cells (eggs and sperm).