Match the columns $($some items have more than one match$)$:

A$.\_\_\_\_$ It is a purine

B$.\_\_\_\_$ It is a pyrimidine

C$.\_\_\_\_$ One$-$ring

Cytosine $($C$)$ D$.\_\_\_\_$ Two$-$rings

Thymine $($T$)$ E$.\_\_\_\_$ Pairs with thymine $($T$)$ on the opposite DNA strand

Adenine $($A$)$ F$.\_\_\_\_$ Pairs with adenine $($A$)$ on the opposite DNA strand

Guanine $($G$)$ G$.\_\_\_\_$ Pairs with cytosine $($C$)$ on the opposite DNA strand

Uracil $($U$)$

H$.\_\_\_\_$ Pairs with guanine $($G$)$ on the opposite DNA strand

I. $\_\_\_\_$ Pairs with adenine $($A$)$ in a double stranded RNA