Answer: The correct answer is- B) B-C-D-A that is DNA nucleotide- Codon- Gene- Chromosome.
DNA ( deoxyribonucleic acid) is considered as the genetic material of living organisms. It is made up of small units called nucleotide ( which contains deoxyribose sugar, phosphate, and nitrogenous base).
A sequence of three nucleotide is called codon ( which codes for a particular amino acid).
Different codons are present in a gene, which is a segment of DNA coding for a particular protein.
Finally, genes are present on chromosome ( thread like structure composed of DNA).
Thus, option B) correctly depicts the given components in order, from smallest to largest.
