From the following, the correct appearance of a chromosome at the beginning of prophase of mitosis and the number of DNA strands in the chromosome is:

Step-by-step solution

In mitosis, before entering the divisional phase, cell has undergone the S-phase where DNA duplication occurs resulting in formation and appearance of chromosome where each chromosome has two sister chromatids joined and each chromatid has 2 DNA. So in total 4 DNA in the chromosome during prophase of mitosis