During metaphase, all of the chromosomes are aligned in a plane called the metaphase plate, or the equatorial plane, midway between the two poles of the cell. The sister chromatids are still tightly attached to each other.
Chromosomes condense and become more visible. Each set of sister chromatids pair up with its homologous pair of chromosomes, forming a set of four chromatids.
This is exactly from the Bio textbook, The correct answer is prophase 1 but those arent your answer choices
