Answer:
Option (B).
Explanation:
Cell division may be defined as the process by which parent cell divides to form daughter cells and increase its number. Two types of cell division are mitosis and meiosis.
The gametic cells generally produced by the process of meiosis. Crossing over is seen in mitosis but the independent assortment is not a source of genetic variability seen in mitosis.
Thus, the correct answer is option (B).