Identify the Nuclide That Has the Shortest Half-Life $\begin{array} { c } 235 \\92\end{array}$

Identify the nuclide that has the shortest half-life.

A) $\begin{array} { c } 235 \\92\end{array}$ U
B) 14
6 C
C) $\begin{array} { c } 220 \\86\end{array}$ Rn
D) 219
90 Th
E) 232
90 Th