Answer:
The correct answer will be option-D.
Explanation:
The cell cycle is the sequential steps of events which explains the duplication of the genetic material and division of the cell into daughter cells.
It usually takes place in 24 hours where it is divided into four phases: Gap 1 (G₁), Synthesis phase, Gap 2 (G₂) and Mitotic phase (M phase). M phase can be marked easily as it takes place during the short period of time usually in one hour.
In the given question, the marked area represents the shortest phase or M phase during which cell divides its nucleus and cytoplasm, therefore, is considered the cell division phase.
Thus, option-D is the correct answer.
