Which of the Following Sequences Accurately Reflects the Relative Sizes $\rarr$

Which of the following sequences accurately reflects the relative sizes of the components of the human genome, ordered from smallest to largest?

A) DNA $\rarr$ gene $\rarr$ chromosome
B) DNA $\rarr$ chromosome $\rarr$ gene
C) gene $\rarr$ chromosome $\rarr$ DNA
D) gene $\rarr$ DNA $\rarr$ chromosome