Which of the Following Sequences Correctly Orders the Units of Genetics

Which of the following sequences correctly orders the units of genetics, from the smallest and most specific to the largest and most inclusive

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