Liquid chemical rockets are often classified by the type of propellants used. Which of the following is correct?
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Liquid rocket propellants are commonly classified as
\[
\boxed{
\begin{aligned}
\text{Hypergolic} &\rightarrow \text{Ignite on contact}
\text{Cryogenic} &\rightarrow \text{Stored at very low temperatures}
\text{Storable} &\rightarrow \text{Stored at normal temperatures}
\end{aligned}
}
\]