The correct option is D Interphase
The most active stage of the cell cycle is the interphase. It represents the phase between two successive M phases. Though called the resting phase, it is the time during which the cell is preparing for division by undergoing both cell growth and DNA replication in an orderly manner.
Prophase, metaphase and telophase are all stages of the M phase. These represent the phases when the actual cell division or mitosis occurs.