The correct option is B Spindle fibres
Chromosomes are defined as the structure of DNA (deoxyribonucleic acid) and proteins, which are present in the cell nucleus. Spindle fibers are responsible for the separation of chromosomes during cell division. They form a part of the spindle apparatus that takes part during mitosis and meiosis to check that each daughter cell receives the correct chromosomes number. They also help in pulling the chromosomes to the different ends of the cell.