The replication of chromosomes takes place during

Cell cycle is divided into two phases

1. Interphase

2. M-phase

Interphase is the longest phase of a cell cycle in which a cell prepares itself to divide.

In the interphase, DNA replication takes place after which chromosome number gets doubled.

Actual cell division occurs in the M-phase of the cycle.

The correct answer is Option A,i.e., replication of chromosomes takes place during interphase