The spindle fibres start appearing from stage of karyokinesis. 1. prophase
2. methaphas
3.araphase
4. telophasa​

methaphas is the answer

[A] Prophase.

In metaphase, the microtubules pull the sister chromatids and align them in the equatorial plane. In anaphase, the sister chromatids get separated due to the pulling by the spindle fibers. Therefore, the stage of karyokinesis, the spindle fibres start appearing is prophase.

i am positive it is c. condensing but i may be wrong

b is dominant over the allele for the white fur.