Answer:
The correct answer is option C, Chromosome
Step-by-step explanation:
The structure of chromosome consists of DNA forming a tightly coiled structure around associated proteins mainly histone. The DNA looks like thread like structures which are packaged to form chromosome. So the basic structure of all the chromosomes consists of a DNA molecule and a protein. The double stranded DNA loops around the histones twice to form nucleosome which are considered as building block of chromatin packaging